take 2 sharks, antipoison, 4 range pots and rest pray pots. go next to wall under the stone thing and keep "shooting" the middle one. best way to throw chins is the short fuse. it hits hardest and you save chins, still you can get teh same exp as using mid fuse wich is bit faster style to trow but doesn't hit that hard.
nah chins arent that good anyways they hit like 15 max for my range lvl (83 = suckish)
SO all you'll be doing is spending a hell of alot of money and getting slower xp
monkey madness underground is probs the only decent place to train range really quickly and not worrying about money