Fire for CM trash packs

[Quetzatlus]

So I've already done my CMs, but I may help a few friends out with theirs. I'll experiment myself, but has anyone else tried fire for trash packs?

Pyro Dot + Living bomb on the whole world + glyphed dragon's breath is bonkers on AOE, seems like you could do that for trash then switch to frost for bosses? Could also throw in a flamestrike or two.

I think Meteor will be the best bet, since its probably all about the burn dmg on 8+ targets anyway.

[Laodi]

Meteor is shared dmg. So its not that good for trash. Maybe reducing CD of combustion is better. But in the end the lack of crit will make the biggest problem.
Frost with FBomb has also a very good way to do tons of dmg and it all depends on your groupsetup. If u really lack AE then maybe fire could shine. But this would be a very suboptimal group so u will have a difficult time.