Reopende since I did not get an answer.
Topic: Devour Arrow vs Spray of Teeth.
Question: At what point will SoT surpass DA?
Clearly this depends on your critchance and critdamage bonus. But have someone done the theorycraft around the topic? Found a thread on official forum that compared all Hungeriung arrows. Though it never discussed Spray of teeth. Only said "depends".
Offtopic.
I really would like a dummy in the towns similar to wow :P. So you could actually do some estimations. Let say the dummy have the same amount of resist/hp as the boss on the act/difficulty. And by that you could see how long it take to kill it with diffrent builds/rotations.