Dog Moon
Adventurer
Know what you mean. Psykers are insanely powerful. We play ascended campaign (epic lvl in other words) and the psyker has an order of magnitude more damage output than the others. But I quickly learnt to compensate. It's easier in epic levels since I can make battles that require the pc's to concentrate on multiple fronts. And I like to throw in some eldar seers who can easily outpsyke her
Well, we were inexperienced with the system and running a prewritten adventure. It was neat, I admit, but the whole Psyker thing as I said just ended up ruining everything. We thought about running a new campaign and banning Psykers, but sadly there just wasn't enough interest anymore. I would have been fine trying again, but I was in the minority and now... we just don't play it.