Originally Posted by
suffeli
You should re-read the tooltip of Elemental Oath. "In addition, while Clearcasting from Elemental Focus is active, you deal 10% more spelldamage". To keep that buff up, with some napkin math, you need 50% crit to crit with every 2nd spell so all your spells get that 10% bonus.
EDIT: Let me simplify this a bit to you. I'll make a scenario: Say you got 0% crit and 0% haste, your LvB will still have 100% crit chance due to its nature.
Time(s) Spell
0-1.5 LvB, crit. (no bonus)
1.5-3.5 LB, non crit (10% dmg bonus)
3.5-5.5 LB, non crit (10% dmg bonus)
5.5-7.5 LB, non crit (no bonus)
7.5-9.5 LB, non crit (no bonus)
9.5-11 LvB, crit (no bonus)
As you can see, with 0% crit you still get 1/3 (33%) uptime for Clearcasting. Now if your crit stays the same, but you get....lets say a huge number of 50% haste!
Time(s) Spell
0-1 LvB, crit. (no bonus)
1-2 LB, non crit (10% dmg bonus)
2-3 LB, non crit (10% dmg bonus)
3-4 LB, non crit (no bonus)
4-5 LB, non crit (no bonus)
5-6 LB, non crit (no bonus)
6-7 LB, non crit (no bonus)
7-8 LB, non crit (no bonus)
8-9 LvB, crit (no bonus)
Now the Clearcasting uptime was 2/9. 1/3 > 2/9. Now, go figure out why haste increases the value of crit.