Hey Artan,

Well i'm going to most likely try all of them and see which performs better with the parser, i'm suspect crit and determination to do the best.

With the high level spells once you hit 44 things get easier with the "Firestarter" trait, which allows you to spam cast Fire I and gives a 40% chance your Fire III will be a free cast and instant! Which is lovely so at the moment my rotation is Thunder (Keep thunder up don't let it drop off, and if you get the instant cast make sure to use it!) > Fireball (till proc) > Fire III (If Proc)> Blizzard III

Thats basically what im doing at the moment.

Blizzard III will cost next to no mana because of your Astral Fire Buff and the cast time is increased as well and Umbral Ice III at the moment is restoring about 1600 mana a tick for me, so two ticks and im back to spamming Fire I for the proc

Hope this helped!