Hey man, first of all, i suggest getting 96 strength, 99 range.
Second, for gear: Ghsotly hood, glory, leather body (or ghostly robes?), black d'hide chaps, climbing boots, addy gloves from RFD, ring of life/recoil, zammy god cape.
For weapons, i would either go with magic shortbow with best arrows you can use, or go with rune cbow with dragon bolts (e).
ice barrage>range> dds/d claw finish.
I have never actually PK'ed so my advice may not the top advice you can get, but I have been reading alot about pures lately and this is what i've come up with.
You might have some luck PMing Theron if you have any other questions, he helped me out with the same type of question.