Welcome to this Frost Mage DPS guide written by Nova.
One of the top cleave classes (2 targets). Also great on AoE (3-8 targets).
Great mobility, and double immunity 2x Ice Block to potentially cheese specific boss mechanics.
Lacking behind on Single Target on some boss fights after recent Ice Lance nerf (Sludgefist for example).
Bad at dealing with spread target damage (adds far from each other where dot-classes like Shadow Priest might shine).
What has changed
Ability wise we are seeing Mirror Image being a baseline ability for all mages (now a defensive cooldown), together with a few other abilities like Arcane Explosion and Fire Blast. Playstyle wise we are going for an Ice Lance oriented spec. It is basically about getting as many Ice Lance procs as possible and hit that button once it glows. No more Glacial Spike.