I Trained by the training arena which you need to complete biohazard to enter. I did 55-80 range there with bronze knives and range pots. with the best equips such as ranger boots, robin hood, fury etc.
Use iron/steel knives somewhere like bandits, or king lathas's training grounds at the ogre cage. Or if you have cash, you could even cannon your way there while training your melee elsewhere, which would give you great exp for both str & range, as well as keeping your HP low
After you get to about 80ish, I would recommend using red chins if you have the cash and don't mind getting HP experience. It is super fast, and you could achieve 80-99 range in a couple days flat at that point.
Man, I would chin it all the way up to 99. Too bad you didn't do this before bots were killed, it only costed around 20m, now it's probably 60-80m. I would still chin though, you could get 99 range in a week from 63.