Here is the thing though, Zoroark DE already does more damage than Mewtwo (usually), Raikou, and Tornadus. Zoroark BW and Zoroark DE both 2HKO the EXs. I can see the viability of teching in one Zoroark BW if you can find the room, but never more than that.
As far as I can tell, Zekrom EX is...