Using Red Chins at Skeleton Monkeys in Ape Atoll. Use Protect From Melee, and arrange the Monkeys in a 3x3 grid when possible. Averages in 250k xp/hr with 85 Ranged, using 1000-1200 Red Chins. you could also combine this with a cannon i guess, for insane exp; but it would cost an immense ammount of gp(if you can put up a cannon in there(i'm not sure))