Is blizzard not feasible as AOE boxer vs AE?

[Mercbeast]

Blizzard is more mana efficient imo. However its slower. So then it's a threat battle which I have trouble winning.
During my second cast with blizzard some of the group will switch agro to a mage. So now I'm balancing healing with incoming damage. With AE I can kill stuff faster even though it's not as mana efficient. When the mobs switch to mages I dont care because they will dead so fast. Then everyone sits and drinks while I gather next pull

Mana efficiency isn't all that important with 3 or 4 mages.

[Ughmahedhurtz]

Mana efficiency isn't all that important with 3 or 4 mages.

Isn't that entirely dependent on the instance level (re: spell hit mechanics) and mob resistances, though?

[Mercbeast]

Sure, but, most people grinding a caster group are going to avoid fighting orange/red con mobs in dungeons. That isn't efficient regardless of spell