User blog comment:Shaw Fujikawa/Custom Champion Revisit - Arvice, the Wandering Psychic/@comment-1330314-20121126225700/@comment-5266525-20121127211529

Even at 40% cooldown reduction it would take him nearly eleven seconds of constant off-cooldown casting to reach the cap of 3x damage (six successive casts of a 1.8 CD spell leads to 2.98x damage in 10.8 seconds). Teamfights rarely last that long and games in general will rarely let you pound away for that long at any single target. By the time you even reach the cap you'll have done over 2200 magic damage from your Q alone anyway, so it's probably not a big factor.

Not quite true. He gets practically no benefit from mana regeneration but every point of mana on him is equivocal to one point of health, because of his ultimate. If he used energy, his resource bar would be useless as a shield and wouldn't scale, either.

Personally, I don't like the names of his spells, but I don't mind the stacking feature.