The Zeal of Omoz Arkosh custom loadout animation completely overrides the custom animations of the Pits of Omoz and the Dominator's Stance kinetic gems.
They should be compatible. The immortal does nothing but make Doom raise his left hand into the air. That animation can easily be combined with the animations of Pits of Omoz and Dominator's Stance, which make Doom hold his weapon differently in the loadout, which he wields with his right hand.
This is Doom's default loadout stance
This is the custom stance of the Pits of Omoz kinetic gem
This is the Dominator's Stance kinetic gem
And this is the Zeal of Omoz Arkosh custom stance
Here's what it looks like when combining the immortal with the Pits of Omoz, compared to what it is expected to look like
And here's the same with the Dominator's Stance
They should be compatible. The immortal does nothing but make Doom raise his left hand into the air. That animation can easily be combined with the animations of Pits of Omoz and Dominator's Stance, which make Doom hold his weapon differently in the loadout, which he wields with his right hand.
This is Doom's default loadout stance
Spoiler:
This is the custom stance of the Pits of Omoz kinetic gem
Spoiler:
This is the Dominator's Stance kinetic gem
Spoiler:
And this is the Zeal of Omoz Arkosh custom stance
Spoiler:
Here's what it looks like when combining the immortal with the Pits of Omoz, compared to what it is expected to look like
Spoiler:
And here's the same with the Dominator's Stance
Spoiler: