If you prioritize EXP rates over GP, moss giants are the best monsters to train on in F2P. Levels 70-99: Ogresses Ogresses might be the best monsters to kill in F2P. They consistently drop law, nature, and death runes and have a 1/40 chance of dropping rune med helms. You can e...
(you can buy at the Seers village pub for 20gp each), Axe, Pickaxe, Any ogre bow, Any ogre/brutal arrows, Iron spit (smith with an iron bar), Log, Tinderbox, Ogre bellows, Ball of wool, Pot of cream, Raw sweetcorn, Hatchet, Machete, Pot, Raw chicken, Dramen staff, Anti-dragon ...