I'm 72, and I had 46 ranged on runescape classic. I won't say what I did in classic, cause it wouldn't be any good now in rs2.
I think I got to lvl 55 from 46 mostly on chaos druids cause I was collecting herbs, but im not quite sure.
Then from lvl 55 to 70 I am sure I trained on only greater demons on Entrana, except for 338 blue dragons with a total of 10k steel arrows with picking them up.
Only thing with Entrana is you need to be able to make a good bow to use, i just used yew short
I never tryed Fire Giants, I heard they are really good but the few times i've looked in the waterfall place, it was packed full.