You're making a couple of huge mistakes in your build.
First of all, no imp. concussive and/or imp wing clip?
Stunning people is the best way to get away from them.
Second, Combat experience and careful aim.
CE is never that good of a talent or worth picking and CA isnt good for pvp either because of the low int you have (and thus it giving small returns)
3rd, Clever traps is pretty useless, becausae freezing traps dont last longer then 10 seconds in pvp and entrapment is just a bad talent.....
(really, 25% chance at 4 seconds trapped on traps you hardly use with diminishing returns)
Effeciency is also rather useless because PvP matches tend to not last very long.
I'd go with something like
this for arena pvp.