Rpgs with good psionics.

[buffalo bill]

I've played underrail for hundreds of hours, but I prefer the psionic mechanics in caves of qud tbh

I like the mechanics of ADOM. Mindcrafter : https://ancardia.fandom.com/wiki/Mindcraft#Mind_Blast

Name	Description	Formula	Type	Level Gained
Teleport Control	Intrinsic teleport control which cannot be lost.	N/A	N/A	1
Confusion Blast	Bolt which travels in a straight line and performs a confusion attack on every creature it passes through. Range and confusion duration are increased by Willpower and experience level.	N/A	TP	1
Confusion Wave	Performs a confusion attack on every creature in an area around the PC. Radius and confusion duration are increased by Willpower and experience level.	N/A	TP	3
Mind Blast	Bolt which travels in a straight line and performs a damaging attack on every creature it passes through. Range is increased by Willpower and experience level.	((W + CL) / 6 + 1)d5	TP	6
Mental Shield	While active, increases the PC's DV and PV.	DV: + ((W + CL) / 5) PV: + ((W + CL) / 8)	S	9
Mind Wave	Performs a damaging attack on every creature in an area around the PC. Radius is increased by Willpower and experience level.	((W + CL) / 6 + 1)d5	TP	13
Telekinetic Blast	Emits a physical force blast on an adjacent target. Will destroy any trapped door unless it is occupied by a phasing monster (e.g. ghost, earth elemental).	((W / 5) + CL)d3	TK	15
Eyes of the Mind	Shows all creatures with minds*** on the level.	N/A	N/A	18
Greater Mental Blast	A more damaging and costly version of Mind Blast.	((W + CL) / 6 + 1)d9	TP	25
Greater Telekinetic Blast	Emits a physical force blast on any tile in the visible range of the PC. Chance to destroy any diggable wall unless it is occupied by a phasing monster.	((W / 5) + CL)d6	TK	30
Regeneration	While active, grants the PC an additional source of Regeneration.	1 HP / turn	S	35
Teleport Self	Teleports the PC.	N/A	TK	40
Teleport Other	Teleports an adjacent creature.	N/A	TK	45
Greater Mental Wave	A more damaging and costly version of Mind Wave.	((W + CL) / 6 + 1)d9	TP	50

https://ancardia.fandom.com/wiki/Mindcraft#Mind_Blast

Zero cooldowns.

And Adom is the hardest roguelike that I played. I never beat it.

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Does Tides of Numenera has good psionics? I'm curious. Never played it.

I'm beaten ADOM I think about a dozen or so times, with one ultra ending win (a monk, can't remember the race though). Caves of Qud is probably slightly harder than ADOM (though both games are pretty easy if you know what you're doing), and definitely has a better psionic system. (by a lot)

If you're interested in hard roguelikes, try Infra Arcana. It's maybe the best game ever made imo (DoomRL and Fallout 1 might edge it out for me though, but barely).