Cloud of wasps. No explanation needed.
Wolfkinship. Very cool. They track also.
Predator's stance: decent for kill sealing in certain scenarios.
Beastmaster tame is also juiced up over other rangers and can be very useful in certain situations. I'll leave it at that.
It just so turns out that this guy used the two least viable beastmaster PK skills imo. Bears are just lousy, imo. And serpents are very unreliable but can be a kill sealer if you are lucky enough to get the freeze effect.
A good ol' dirt/disarm probably would have been best for this guy, however.