... judge? What judge?
Discipline allows any list, including PsyWar.
You have to "learn" them, though, at the normal cost.
That's where the Chameleon Crafting feat can get
powerstones of arcane/divine from helpful wizards and archivists.
PsyWar 1 high Wis, picks that power, at least 1 rank in ride.
1b) ... psicrystal
1) ...... Hidden Talent: something to share that lasts about the same time; maybe Claws.
1h) ... whichever mount feat you said earlier in the thread
1f) .... Psi Talent 1
1f) ... Psi Talent 2
2nd level retrain the HT feat, but pick the same power as the level 2 power pick.
1 retrained) ... Psi Talent 3
2) ... Psi Talent 4
Do this every encounter.