Bounty Hunter PVP

[Othium]

I've been playing my 50 arsenal merc off and on and I'm not really too impressed with it in pvp. I pull great numbers, I kill many enemies, but when it comes down to it I guess what bothers me most is that in most 1v1 fights it is at a disadvantage (in my opinion) against many classes. I've seen a great deal of pyro powertechs and I'm wondering what the big difference is between powertech pyro and merc pyro. Is powertech vastly better with the pyro spec than merc? I rarely ever see a merc BH with anything but healing or arsenal spec. I'm wondering if they can pull the same numbers with pyro spec as a powertech

Thank you in advance for any responses.