you know something interesting , everyone knows how OP limitless is but no is realizing the implications of the 6 eyes in 40k in the hands of a psyker , as the biggest limit on a psyker is their ability to control , comprehend and manage their warp born powers but the 6 eyes trivializes this to the point that becoming an alpha class psyker Omnimancer with perfect control is something Gojo can do pull with such ease as to make the literal 10s of billions of psykers before him roll in their mass graves with such power that if you can harness it would win imperium the galaxy
like Gojo using all psyker disciplines is such a massive boost in power and versatility that the only reason I won't say he breaks the setting is because this isn't an outside context problem
like here is some of the cool stuff Gojo could learn from the imperial telepathica via inquisition resources and authorization
biomancy - near complete control of biology yours or that of others (total control with the 6 eyes), fixing his inability to heal others , enhancing himself in new ways , bolts of warp empowered bio electric lightning , making his enemies blood boil in their bodies , straight up pupating them via controlling their physical bodies ..ect
Divination - (this one is going to be really busted with the 6 eyes so much so that Gojo will run circles around most other diviners in the galaxy and few who are the very best, oldest and most powerful they will only be profoundly frustrated) . as what he can do with it
- scrying , pretty much what it says divining the present , the 6 eyes means the quality ,range and accuracy of Gojo's scrying will legend
- foretelling the future, same as above
-Combate precognition , in a fight you know your enemies move before they even think to make them , its the trick the jedi do to reflect blaster blots
-post cognition . its about looking into the past to uncover knowledge and secrets
-probability manipulation, here we are entering the really scary stuff for a good diviner can tell which side a coin is going to land on but a great one decided where, when and how that coin is going to land before it even gets tossed
Sanctic Demonology , this is only available to learn for psykers with the inquisition's say so , its about manipulating raw warp energies directly , it lets its users close warp rifts ,banish weak demons, weaken strong demons, disrupt a psykers connection to the warp , step through time to cover distance, directly mess with a target's soul , become your own personal galler field , teleport , phase through walls , slow down time in a localized area , accelerate your own passage of time , mess with your personal time line to make injuries go away as if they haven't happened..ect , its a pretty powerful psyker discipline buts also one of the most dangerous with the highest turn over rates for those who practice it as your more or less trying to do by learning what demons and warp beings do naturally by instinct and often then try to compete with them in that field