I don’t agree with those changes as I feel like it would take the nerf too far, and if you limit the effect of soulblaze or venting shriek that far without giving compensatory buffs to survivability or utility it sort of ruins the class concept of the psyker as a glass cannon capable of massive damage in capable hands. Especially if you’ve already also put a limit on psykinetics aura and perilous combustion. These nerfs alone would be rather massive.
I can’t tell you exactly what the numbers should be like as it would in the end require extensive testing, but I’m more in favor of trying small adjustments here and there until a reasonable level is found, rather than a massive across the board nerf-bat that puts significant limits on every psyker ability.
In that case I think the talent should simply be moved to base coherency mechanic instead (in the way I explained in this previous thread), as I do think the idea of players gaining a buff that somewhat positively scales with the amount of enemy resistance is a nice idea.
It’s the magnitude of the effect that is the problem (the powerlevel scales too steeply with elite density), not that there is such a effect in the first place. Cooldown reduction is nice, and it being able to scale upwards as enemy density increases is nice too, it’s just that it is basically limitless. Flatten the curve a bit, don’t remove the thing entirely would be my ideal solution.
As I wrote in that other thread, the talent is so strong it reduces other builds in comparative viability. They are simply not competitive. Moving the PA effect to base coherency mechanic would free up psyker builds to try different stuff without having to go the almost-mandatory PA route.