Voldo's has decent damage, if it hits OTG or midair, you get free MTC K or MTC and LF mixups, and he is the only character that can do his BT'ed. I think its a pretty decent CE. Zwei's, is -a million on block, kind of slowish, and is only useful in combos or backstep and does ok damage. Aeon's does bad damage, has ok range, and has the random glitch where the fireballs dont hit the opponent, and its kind of unsafe on block. Raphael's is bad damage, bad range, so linear, you feel sorry for him, and doesn't RO even though it looks like it should.