Lowbie Drood

[Estu]

Here is the best EXP you are going to get. Go to East Karana from 14 to 24. Find a dark blue animal, preferably low dark blue. Charm it. Then find another monster higher level than your pet - anywhere from blue to yellow works. Snare it and sic your pet at it. You want to set it up so that your pet takes aggro from the monster late enough that the monster is almost dead by the time your pet is almost dead; use snare, flame lick, or a wind-based stun-nuke for aggro as needed. When both monsters are almost dead, retreat your pet, hide or invis versus animals to lose the pet, and then kill both monsters (you need to lose the pet first so that it doesn't take half of your EXP).

This is far faster than any kind of root-dotting or single-mob kiting and can be done naked (though having a nice club or scimitar helps) as it takes next to no mana. You will blast through your levels.