Sorry I meant Arcane Explosion, not blast.
but I find that way much more difficult because of my lack of armor.
When u start AOE large numbers of mobs about anywhere from 10-20, one VERY TINY movement error are ur dead if ur using the, nova, flamestrike, Coc, AE.
but with ice block, nova, blink, blizzard, blizzard, CoC, nova, Blizzard Combo i never get hit and kill the mobs with about half my mana left over and almost full health.