Move between casts or he'll open a nasty red portal like Nethekurse's Very simple fight.
) #showtooltip Arcane Power /console Sound_EnableSFX 0 /use 13 /use 14 /use Icy Veins /use Arcane Power /console Sound_EnableSFX 1 /run UIErrorsFrame:Clear()
Lower survive-ability, higher DPS and mana pool/mana efficiency.