Why is this thread still going.
One thing anybody forgot to mention though, is that even a dbow spec would rarely ko someone at that level because the max with a dbow at 60 ranged is like 40. Most people at that level will be obby maulers, other rangers or 20 attack pures with lowish str. They'd all be very likely to have 40 hp unless they were soul wars and then it'd be easier to kill them with a normal ranger anyway.
Why not just make a f2p pker with very low hp because in f2p, the max heal is 14 in one go. Imagine 99 with 30 hp on f2p.. that'd work. Or 99 str with 40hp.