ok this will only work on some comps since u need a defensive dispeller.
What u want to do is;
1. Flame shock the warrior.
2. Root him.
3. Run away.
4. Cast lava burst BUT DONT LET IT FINISH! Cancel it like 2/3rds of the way of the cast time.
5. Warrior hopefully spell reflects, flame shock him, it gets reflect so u get flame shock.
6. have ur priest dispell ur flame shock = u get the 30% haste buff from talents. I just discovered this and wrote it :> Hope it can help u as much as it helped me!
30% haste + lightning bolt spam = winwinwwinwiwnwin even sicker if u have BL ^^