Once you cast the first ice lance, it starts a 10 second buff that DOESN'T REFRESH each successive cast?
so you stack it up to 5 for the max buff and you... only have 5 seconds of it remaining so.. 2-3 casts at best of hasted dmg boosted frostbolt?
this needs a serious rework, it's not worth taking over any other even 665 gear.. hell, you'd probably sim higher on 655 multistrike gear.
what a terrible set bonus.