After I go through my rotation and have run out of mana, I normally use that time to Transpose > Blizzard > Thunder II then go back to fire with a buffed or non-buffed fire3.

I put a blizzard in there to make sure I return to full mana during my fire 3 cast (just hit 44..so now this might change with instant fire 3)..

My question is..I see a few people saying simply Blizzard 3 for full regen during a thunder 2.

Would everyone mind sharing their thoughts on how they regen their mana during the ice phase of their rotation?