i have a gmauler....i sugest getting 80 range (mine is 70 and sucks) and 70 str (i have 70 and you will get precisely 58 cb) get 31 prayer, and rush in pvp worlds with 76k in your invo..bounty hunter is useless without the range levels.
You could definitely still pk. You could actually spec out a lot of people at that level. Ancients, range, etc. would help but you could definitely still pk and get kills.