1.5 mil .75 second cast Arcane blasts while Mulligan procs Vers, inside ring of power, Arcane power up, as well as time warp. You can spam Arcane blasts the whole duration a talent, leaving you with 70% mana once Arcane power wears off. (boss usually dies after Arcane power wears off) 4 point Arcane Charges while Arcane explosion spamming = grp of instanced elietes dead in less than 5 seconds with Arcane power up. Also the fastest mage spec with chrono shift giving constant 70% movement speed and shimmer for 2 blinks.
Fire is nice, but Arcane is insane, especially when you get far along with your artifact tree. Arcane missles and arcane barrage become soo strong.