Inquisition hammerhand no longer exists, the source you're using is very out of date and is no longer valid. Not only do inquisitors no long have special psy powers, they also can't pick and if they generate of sanctic, they perils on a double just like every other non-GK caster.
As for if a deathstar is too much for people who think rubricae are anything other than some of the worst units in the game, I'm of 2 minds. 1 says that it's way, waaaaaaay too much and the other says that it's the only way that they'll learn to stop making bad choices.