I've played Psion into Meditant before. The buffs are pretty nice in the early game, but the standard action activation is really problematic if you don't have a surprise round or another way of knowing that you'll be fighting.
Originally Posted by A_Moon
How many times, when the Fighter says "I draw my sword", did you just want to smack that cheating-optimizer in the face and say "No! You don't draw your sword! You draw Orcus!". When the Cleric says "I run away from Orcus!": "No! You run into Orcus! Rogue tries to hide? He hides behind Orcus! The bard in a tavern on the other side the town tries to order a drink? How about a nice frothy mug of Orcus?