With your stats, ideally you'll want to level dg. You could just kill green dragons, but if you can get 65 dg, which isn't even that much xp, you can cannon blue dragons in the Taverly resource dungeon, which will firstly get you a decent amount of ranged xp, and secondly make well over 1m/hr profit. Ideally you'd get 85 and do frosts, which are about 2m/hr without a yak, which would be beneficial all round as you'd get your rapier on the way.