I tried the Psion mod, but the game crashes. Did anyone have a similar problem? Is it because I'm in Linux using proton to run this game? Should I try this mod instead?
https://www.nexusmods.com/baldursgate3/mods/2786
Is a conversion from a P&P class "Unearthed Arcana: The Mystic Class" and so far seems very accurate. This mod in particular could be a full-blown DLC; it adds 9 subclasses like in P&P, and look at 0:30 how many psychological disciplines it adds, according to mod page, it has 38 disciplines.
IDK if cool stuff like "animate weapon" is in the mod, or Mastry of Force, allowing Vader-style choke, pushing enemies, and creating telekinetic barriers. The P&P class >
https://media.wizards.com/2017/dnd/downloads/UAMystic3.pdf
In P&P, animate weapon at high level can deal like its weapon damage + 7d10 force damage. And at lv 12, the
psyker mysthic has 64 psi points, enough to use it 9 times. And using Psionic Mastery to use it at maximum STR, a animated weapon can dish its damage, a regular greatsword being manipulated with the power of mind this way can dish 2d6+9d10 and in late BG3 game, there is a huge abundange of powerful magical weapons.
EDIT : 12:29 - Knocking a enemy prone, with a CANTRIP. This class seems very OP.