Deva is teh win. The only thing I don't like about having a level 36 ZK farmer is that I can't have Deva yet. I'm also a fan of Mock when I'm with a party. Just wish it had a shorter cooldown.
If I could actually crit with Percise attack it would definately be that. Other than that, I'd have to say for a tanker build it would be Mock with full CD, for a damage dealer it would be Power Hit with full CD and dmg. But overall though I'd say.......Devastate.