Hey guys, after watching this video, especially at 18:29, his IW PP damage is insane. However, he is totally useless(?) after IW is on cooldown. Basically his build is wiz2 (Sure Spell negates interruption while PP) -Cryo1 Psy1 of course - Rune Caster and Wiz 3 (300% Ice 150% Matk from Quick Cast). Those aforementioned classes are pretty much staple on this build except Pyro 1. I'm not so sure as I heard Pyro 1 falls off late game, but Psychic Pressure utilizes even further with Fire Ball during that combo.

In other word, should I advance to Pyro 1 or replace it with Warlock 1 for better(?) damage, or even Cryo 2 to boost the durability of the Ice Wall? Any other suggestions are very welcome.