Hm, alot of people ask me this, and i seem to answer different each time. The way i got it up was to spend alot of money on it lol. I paid for it by pot merchanting. And i used to make money off antifires and magic pots, because dragon killing was big and magic pots sold slowely, but i made 1.5k profit when i sold for 6k ea :). At lower levels i unid merchanted, thats quite good, you buy unids, id them, use the ones you want, sell what you dont want to use. If your 72 then i say do range pots all the way, maybe make a few hundered super weapon poisons at 82 to make you some cash but ranges sell the best in bulk. You lose alot, but thats just how herblore goes.