Clearcasting happens 100% of the time when you crit. EO is amazing for dps now. But i guess since you crit with LvB every time its up, you should have clearcasting up a lot.

quote" Elemntal Focus - After landing a critical strike with a Fire, Frost, or Nature damage spell, you enter a Clearcasting state. The Clearcasting state reduces the mana cost of your next 2 damage or healing spells by 40%.

edit:I missed the AND EO part, but it still a great dps upgrade from pre 3.08