Quote Originally Posted by IAmPotent View Post
Blizz2's cast time may have been 1.85 secs, but the GCD is 2.5, so you have to go with the GCD, because you're not going to be casting anything between 2 Blizz2's or a Blizz2 and the next spell.

I guess it's good you know the cast times though.
My GCD is 2.35 (which coincides with the cast times). But if you want to take it that way

Blizzard 2s + animation = 2.5
Freeze 3s + animation > 2.5