I currently have 55 range and have been training at flesh crawlers. I tried lessers but I don't hit often enough to consider it a good spot to train. Does anyone know of any good spots?

Guards in fally aren't so bad and the barbarians in the barbarian village are really good.

You could try the dark wizards south of varrock provided that you have some cheap food to use up as they do tend to hit you a bit. The runes you get would probably pay for the food though.

Minotaurs are pretty good, because there are safespots, and they drop loads of iron arrows. Lessers are better at 60+ ranged.

Moss giants. Plenty of safespots. Big bones. Money and good drops