There are a few issues with Chaos Knight's tooltips, throughout his abilities. Besides the issues, there are more things that could be improved.

As always I prepared something and here are the changes I did

Chaos Bolt:
* Reworded description to fit the default style more
* Added cast range
* Added ALT note about projectile info (speed and disjoint)

Reality Rift:
* Fixed debuff text and name not showing (due to a typo in the dota_english.txt file)
* Reworded description to fit the default style (to avoid "you" wording)
* Added ALT note about illusion pull radius
* Reworded existing ALT note to be more general
* Added ALT note for disjoint
* Added ALT note telling the target is not interrupted
* Reworded talent upgrade from "Reality Rift Pierces Spell Immune" to "Reality Rift Pierces Spell Immunity" for consistency

Chaos Strike:
* Removed outdated dispel info in header (no longer has a debuff, so it's pointless)
* Added spell immunity interaction to header
* Reworded description to fit the default style more

Phantasm:
* Reworded description to fit the default style (to avoid "will" wording)
* Fixed the 50% chance value not being highlighted
* Fixed the outgoing damage repeating the same value 3 times in description
* Removed value mentions from Scepter description
* Added scepter cast range to traits
* Shortened ALT note about the 0.5 sec invulnerability and made it first note
* Removed the ALT note about the dispel (info already in description with dispel type)
* Added ALT note about the disjoint
* Added ALT note saying previous illus are destroyed on recast


Image comparing the changes to the current tooltips
Spoiler: 


And here are the modified dota_english.txt and npc_abilities.txt

Code:
		//CHAOS KNIGHT
		"DOTA_Tooltip_ability_chaos_knight_chaos_bolt"							"Chaos Bolt"
		"DOTA_Tooltip_ability_chaos_knight_chaos_bolt_Description"				"Throws a mysterious bolt of energy at the target unit, stunning it for a random duration and dealing random damage."
		"DOTA_Tooltip_ability_chaos_knight_chaos_bolt_Lore"						"Even Chaos Knight cannot predict this manifest of unholy energy."
		"DOTA_Tooltip_ability_chaos_knight_chaos_bolt_stun_min"					"MINIMUM STUN:"
		"DOTA_Tooltip_ability_chaos_knight_chaos_bolt_stun_max"					"MAXIMUM STUN:"
		"DOTA_Tooltip_ability_chaos_knight_chaos_bolt_damage_min"				"MINIMUM DAMAGE:"
		"DOTA_Tooltip_ability_chaos_knight_chaos_bolt_damage_max"				"MAXIMUM DAMAGE:"
		"DOTA_Tooltip_ability_chaos_knight_chaos_bolt_cast_range"				"CAST RANGE:"
		"DOTA_Tooltip_ability_chaos_knight_chaos_bolt_Note0"					"The stun duration and damage values dealt are inversely related."
		"DOTA_Tooltip_ability_chaos_knight_chaos_bolt_Note1"					"The projectile travels at a speed of 1000 and can be disjointed."
		"DOTA_Tooltip_ability_chaos_knight_reality_rift"						"Reality Rift"
		"DOTA_Tooltip_ability_chaos_knight_reality_rift_Description"			"Opens a rift at a random point between Chaos Knight and the target, teleporting both and all illusions of Chaos Knight within range towards it. Reduces the target's armor for %armor_duration% seconds."
		"DOTA_Tooltip_ability_chaos_knight_reality_rift_Lore"					"Armageddon rides between the planes, bringing Chaos Knight to his victim wherever he may hide."
		"DOTA_Tooltip_ability_chaos_knight_reality_rift_Note0"					"Teleports all illusions owned by Chaos Knight within a 1375 radius around him."
		"DOTA_Tooltip_ability_chaos_knight_reality_rift_Note1"					"Chaos Knight and the target unit are made to face each other, and Chaos Knight and his illusions are ordered to attack the target."
		"DOTA_Tooltip_ability_chaos_knight_reality_rift_Note2"					"Does not disjoint projectiles."
		"DOTA_Tooltip_ability_chaos_knight_reality_rift_Note3"					"Does not interrupt the target's channeling spells."
		"DOTA_Tooltip_ability_chaos_knight_reality_rift_cast_range"				"CAST RANGE:"
		"DOTA_Tooltip_ability_chaos_knight_reality_rift_armor_reduction"		"ARMOR REDUCTION:"
		"DOTA_Tooltip_ability_chaos_knight_reality_rift_armor_duration"			"REDUCTION DURATION:"
		"DOTA_Tooltip_ability_chaos_knight_chaos_strike"						"Chaos Strike"
		"DOTA_Tooltip_ability_chaos_knight_chaos_strike_Description"			"Grants Chaos Knight's attacks a chance to deal bonus damage and lifesteal with the bonus damage for %lifesteal%%% of the damage."
		"DOTA_Tooltip_ability_chaos_knight_chaos_strike_Lore"					"Chaos Knight's unwieldy power bludgeons those who stand before him, crushing the thickest of armors."
		"DOTA_Tooltip_ability_chaos_knight_chaos_strike_crit_chance"			"%CRITICAL CHANCE:"
		"DOTA_Tooltip_ability_chaos_knight_chaos_strike_crit_damage"			"%CRITICAL DAMAGE:"
		"DOTA_Tooltip_ability_chaos_knight_chaos_strike_lifesteal"				"%CRITICAL LIFESTEAL:"
		"DOTA_Tooltip_ability_chaos_knight_phantasm"							"Phantasm"
		"DOTA_Tooltip_ability_chaos_knight_phantasm_Description"				"Summons several phantasmal copies of the Chaos Knight from alternate dimensions. There is a %extra_phantasm_chance_pct_tooltip%%% chance for an extra phantasm to be summoned. The phantasms deal %outgoing_damage_tooltip%%% damage, but take %incoming_damage_tooltip%%% damage.\n\nUpgradeable by Aghanim's Scepter.\nDISPEL TYPE: Basic Dispel"
		"DOTA_Tooltip_ability_chaos_knight_phantasm_Lore"						"Drawing on his battles fought across many worlds and many times, phantasms of the Chaos Knight rise up to quell all who oppose him."
		"DOTA_Tooltip_ability_chaos_knight_phantasm_Note0"						"Truns Chaos Knight invulnerable for 0.5 seconds upon cast."
		"DOTA_Tooltip_ability_chaos_knight_phantasm_Note1"						"Disjoints projectiles upon cast."
		"DOTA_Tooltip_ability_chaos_knight_phantasm_Note2"						"Recasting Phantasm destroys illusions from a previous cast."
		"DOTA_Tooltip_ability_chaos_knight_phantasm_images_count"				"NUMBER OF PHANTASMS:"
		"DOTA_Tooltip_ability_chaos_knight_phantasm_extra_phantasm_chance_pct_tooltip"	"%EXTRA PHANTASM CHANCE:"
		"DOTA_Tooltip_ability_chaos_knight_phantasm_illusion_duration"		"PHANTASM DURATION:"
		"DOTA_Tooltip_ability_chaos_knight_phantasm_incoming_damage_tooltip"	"%PHANTASM DAMAGE TAKEN:"
		"DOTA_Tooltip_ability_chaos_knight_phantasm_outgoing_damage_tooltip"	"%PHANTASM DAMAGE:"	
		"DOTA_Tooltip_ability_chaos_knight_phantasm_aghanim_description"		"Reduces cooldown and allows Phantoms to be cast on an allied hero."
		"DOTA_Tooltip_ability_chaos_knight_phantasm_cooldown_scepter"			"SCEPTER COOLDOWN:"
		"DOTA_Tooltip_ability_chaos_knight_phantasm_cast_range_scepter"			"SCEPTER CAST RANGE:"
		"npc_dota_hero_chaos_knight_bio"										"The veteran of countless battles on a thousand worlds, Chaos Knight hails from a far upstream plane where the fundamental laws of the universe have found sentient expression.  Of all the ancient Fundamentals, he is the oldest and most tireless, endlessly searching out a being he knows only as \"The Light.\"  Long ago the Light ventured out from the progenitor realm, in defiance of the first covenant.  Now Chaos Knight shifts from plane to plane, always on the hunt to extinguish the Light wherever he finds it.  A thousand times he has snuffed out the source, and always he slides into another plane to continue his search anew.  
Upon his steed Armageddon he rides, wading into battle with maniacal frenzy, drawing strength from the disorder of the universe.  A physical manifestation of chaos itself, in times of need he calls upon other versions of himself from other planes, and together these dark horsemen ride into battle, as unstoppable as any force of nature.  Only when the last Light of the world is scoured from existence will the search be ended.  Where rides the Chaos Knight, death soon follows."

		"DOTA_Tooltip_ability_special_bonus_unique_chaos_knight"	"Reality Rift Pierces Spell Immunity"



		"DOTA_Tooltip_modifier_chaos_knight_reality_rift"						"Reality Rift"
		"DOTA_Tooltip_modifier_chaos_knight_reality_rift_Description"			"Armor reduced by %dMODIFIER_PROPERTY_PHYSICAL_ARMOR_BONUS%."
		"DOTA_Tooltip_modifier_chaos_knight_chaos_strike_debuff"				"Chaos Strike"
		"DOTA_Tooltip_modifier_chaos_knight_chaos_strike_debuff_Description"	"Movement speed reduced by %dMODIFIER_PROPERTY_MOVESPEED_BONUS_PERCENTAGE%%%."
Code:
	//=================================================================================================================
	// Chaos Knight: Chaos Bolt
	//=================================================================================================================
	"chaos_knight_chaos_bolt"
	{
		// General
		//-------------------------------------------------------------------------------------------------------------
		"ID"					"5426"														// unique ID number for this ability.  Do not change this once established or it will invalidate collected stats.
		"AbilityBehavior"				"DOTA_ABILITY_BEHAVIOR_UNIT_TARGET"
		"AbilityUnitTargetTeam"			"DOTA_UNIT_TARGET_TEAM_ENEMY"
		"AbilityUnitTargetType"			"DOTA_UNIT_TARGET_HERO | DOTA_UNIT_TARGET_BASIC"
		"AbilityUnitDamageType"			"DAMAGE_TYPE_MAGICAL"
		"SpellImmunityType"				"SPELL_IMMUNITY_ENEMIES_NO"
		"SpellDispellableType"			"SPELL_DISPELLABLE_YES_STRONG"
		"FightRecapLevel"				"1"
		"AbilitySound"					"Hero_ChaosKnight.ChaosBolt.Cast"

		// Casting
		//-------------------------------------------------------------------------------------------------------------
		"AbilityCastRange"				"500"
		"AbilityCastPoint"				"0.4"
		
		// Time		
		//-------------------------------------------------------------------------------------------------------------
		"AbilityCooldown"				"10.0"

		// Cost
		//-------------------------------------------------------------------------------------------------------------
		"AbilityManaCost"				"140"

		// Special
		//-------------------------------------------------------------------------------------------------------------
		"AbilitySpecial"
		{
			"01"
			{
				"var_type"				"FIELD_INTEGER"
				"chaos_bolt_speed"		"1000"
			}
			"02"
			{
				"var_type"				"FIELD_INTEGER"
				"stun_min"				"1 1 1 2"
			}
			"03"
			{
				"var_type"				"FIELD_INTEGER"
				"stun_max"				"2 3 4 4"
			}
			"04"
			{
				"var_type"				"FIELD_INTEGER"
				"damage_min"			"75 100 125 150"
			}
			"05"
			{
				"var_type"				"FIELD_INTEGER"
				"damage_max"			"200 225 250 275"
			}
			"06"
			{
				"var_type"				"FIELD_INTEGER"
				"cast_range"			"500"
			}
		}
	}

	//=================================================================================================================
	// Chaos Knight: Reality Rift
	//=================================================================================================================
	"chaos_knight_reality_rift"
	{
		// General
		//-------------------------------------------------------------------------------------------------------------
		"ID"					"5427"														// unique ID number for this ability.  Do not change this once established or it will invalidate collected stats.
		"AbilityBehavior"				"DOTA_ABILITY_BEHAVIOR_UNIT_TARGET | DOTA_ABILITY_BEHAVIOR_ROOT_DISABLES"
		"AbilityUnitTargetTeam"			"DOTA_UNIT_TARGET_TEAM_ENEMY"
		"AbilityUnitTargetType"			"DOTA_UNIT_TARGET_HERO | DOTA_UNIT_TARGET_BASIC"
		"SpellImmunityType"				"SPELL_IMMUNITY_ENEMIES_NO"
		"SpellDispellableType"			"SPELL_DISPELLABLE_YES"
		"FightRecapLevel"				"1"
		"AbilitySound"					"Hero_ChaosKnight.RealityRift"

		// Casting
		//-------------------------------------------------------------------------------------------------------------
		"AbilityCastRange"				"550 600 650 700"
		"AbilityCastPoint"				"0.3"

		// Time		
		//-------------------------------------------------------------------------------------------------------------
		"AbilityCooldown"				"18 14 10 6"


		// Cost
		//-------------------------------------------------------------------------------------------------------------
		"AbilityManaCost"				"50"
		
		// Special
		//-------------------------------------------------------------------------------------------------------------
		"AbilitySpecial"
		{
			"01"
			{
				"var_type"					"FIELD_INTEGER"
				"cast_range"				"550 600 650 700"
			}
			"02"
			{
				"var_type"					"FIELD_INTEGER"
				"armor_reduction"			"-1 -3 -5 -7"
			}		
			"03"
			{
				"var_type"					"FIELD_INTEGER"
				"armor_duration"			"8"
			}
		}
	}

	//=================================================================================================================
	// Chaos Knight: Chaos Strike
	//=================================================================================================================
	"chaos_knight_chaos_strike"
	{
		// General
		//-------------------------------------------------------------------------------------------------------------
		"ID"					"5428"														// unique ID number for this ability.  Do not change this once established or it will invalidate collected stats.
		"AbilityBehavior"				"DOTA_ABILITY_BEHAVIOR_PASSIVE"
		"SpellImmunityType"				"SPELL_IMMUNITY_ENEMIES_YES"
		"AbilitySound"					"Hero_ChaosKnight.ChaosStrike"

		// Special
		//-------------------------------------------------------------------------------------------------------------
		"AbilitySpecial"
		{
			"01"
			{
				"var_type"					"FIELD_INTEGER"
				"crit_chance"				"12"
			}
			"02"
			{
				"var_type"					"FIELD_INTEGER"
				"crit_damage"				"125 175 225 275"
			}	
			"03"
			{
				"var_type"					"FIELD_INTEGER"
				"lifesteal"					"75"
			}		
		}
	}


	//=================================================================================================================
	// Chaos Knight: Phantasm
	//=================================================================================================================
	"chaos_knight_phantasm"
	{
		// General
		//-------------------------------------------------------------------------------------------------------------
		"ID"							"5429"														// unique ID number for this ability.  Do not change this once established or it will invalidate collected stats.
		"AbilityBehavior"				"DOTA_ABILITY_BEHAVIOR_NO_TARGET"
		"AbilityType"					"DOTA_ABILITY_TYPE_ULTIMATE"
		"FightRecapLevel"				"2"
		
		"AbilityUnitTargetTeam"			"DOTA_UNIT_TARGET_TEAM_FRIENDLY"
		"AbilityUnitTargetType"			"DOTA_UNIT_TARGET_HERO"
		"AbilityUnitTargetFlags"		"DOTA_UNIT_TARGET_FLAG_NOT_CREEP_HERO"
		"AbilityCastRange"				"1200"
		"HasScepterUpgrade"			"1"
		"AbilitySound"					"Hero_ChaosKnight.Phantasm"
		
		// Casting
		//-------------------------------------------------------------------------------------------------------------
		"AbilityCastPoint"				"0.4"

		// Time		
		//-------------------------------------------------------------------------------------------------------------
		"AbilityCooldown"				"130"

		// Cost
		//-------------------------------------------------------------------------------------------------------------
		"AbilityManaCost"				"125 200 275"

		// Special
		//-------------------------------------------------------------------------------------------------------------
		"AbilitySpecial"
		{
			"01"
			{
				"var_type"					"FIELD_INTEGER"
				"images_count"				"1 2 3"
			}
			"02"
			{
				"var_type"				"FIELD_INTEGER"
				"extra_phantasm_chance_pct_tooltip"			"50"
			}
			"03"
			{
				"var_type"					"FIELD_FLOAT"
				"illusion_duration"			"42"
			}
			"04"
			{
				"var_type"					"FIELD_INTEGER"
				"outgoing_damage"			"0"
			}
			"05"
			{
				"var_type"					"FIELD_INTEGER"
				"outgoing_damage_tooltip"			"100"
			}
			"06"
			{
				"var_type"					"FIELD_INTEGER"
				"incoming_damage"			"160"
			}
			"07"
			{
				"var_type"					"FIELD_INTEGER"
				"incoming_damage_tooltip"			"260"
			}
			"08"
			{
				"var_type"				"FIELD_FLOAT"
				"invuln_duration"		"0.5"
			}
			"09"
			{
				"var_type"				"FIELD_INTEGER"
				"vision_radius"			"400"
			}
			"10"
			{
				"var_type"				"FIELD_INTEGER"
				"cooldown_scepter"		"110"
			}
			"11"
			{
				"var_type"				"FIELD_INTEGER"
				"cast_range_scepter"	"1200"
			}
		}
	}