So a few thoughts
-Smite is really weak at base right now, so maybe having it add stacks of Soulblaze as well would help give it some usage, or the explosions of enemies does AOE or something. Also reducing cost or increasing base damage would also help, it shouldnt need another perk entirely to be usable.
Perhaps add a heavy lighting strike attack where you call down a bolt of lightning to give it some damage?
-Assail is strong in lower difficulties but somewhat anorexic in higher ones, this comes from the time needed to get the shards out. What if the main attack launched all shards at once? Youd deal with the spammyness by making it a one off, and add value to the ranged single shard attack, while also giving it use it upper tier and making it a good midway between Brain Burst’s High single target damage and Smite’s crowd control. It would be decent at both but not as good as either, and it wouldnt e as obnoxious to other players as it would be a one off.
-Brain Burst needs some form of AOE or stun, it makes Psyker’s too vulnerable for too little pay off.
-Telekine shield shouldnt feel so weak, its biggest strength is blocking ranged, which is good, but maybe ad a 3rd perk node that applies Soulblaze to enemies that enter it or some status effect lie that?
The main issue with all of these abilities is they prevent you from using your weapons and hinder movement, unlike alot of the other classes with grenades. They also come with the peril meter attached, so they SHOULD feel a little stronger than other classes abilities, especially to make up for a Psyker’s squishyness. Right now its hard not to feel like Psykers are weak and OP at the same time, they are OP in niche annoying ways, and weak all other times. this makes them unfun to play and unfun to play with. They need their powers to be strong to make up for their weakness, they ARE the glass cannons of the game. The problem is they feel too restricted in perks and powers, and their abilities never feel strong enough to use at the high end, and too strong at the low end. They should feel lie another aspect of the team, but they are either seen as ruining the fun by using too strong abilities at lower tier and a liability at the upper. Bug though it may be, the unlimited Smite build at least makes them an asset to the team at upper tiers, and somewhat annoying at lower. Im not saying keep unlimited Smite around, just consider why something like this, a bug that should be game breaking, instead feels game balancing in some way. You wouldnt call an Ogryn OP for tanking damage, you wouldnt call a Zealot OP for supporting the team.
What are your problems with Psyker, both playing with and as one, and how would you fix it?