Just a note snare resist can in other ways then just resisting the occasional hamstring. Not many people know this but it adds flat out to your ability to resist frostbolt. The way this works is if you resist the snare you resist the entire thing. 15% chance to fully resist a frostbolt actually could come in quite handy considering the amount of teams that have frost mages.
Although frostbolt is a binary spell, this is not true from my experience.
I had 25% snare- and rootresist so it happened frequently that i resisted the snare part of the bolt, but not the damage.