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Avalanche is now a high damage cranial(as far as I have noticed, from being avalanched by certain invoker), with a much lower chance of actually lagging. Anyone with any decent SvS dont have trouble not getting crushed.

Suggestions:
1)
Reduce it to one round again, and reduce the chance of lag. This will also effectivly reduce the total damage it do, since such is dependant on crushing. But also make it so that they cant get of a 3rd avalanche after one did not crush. example:

Crush! Two round lag.
No Crush! Next round.
(You should be able to flee here, in the pulse before the third avalanche.)
Crush! Two round lag.

2)
Keep it at two rounds, but let the lag be one pulse more than the spell lags them. Because of the greater lag on the spell, killing people with avalanche will take longer time. In addition you get a chance of actually beating them in a pure damage contest.

3)
If it gonna be a high level cranial, make it work like it then. Increase the chance of a crush to a very high one. But let people flee freely between each spell.

ATK