I wouldn't rule out a necro. Feign death will help you a lot if you need to suddenly afk, and they're capable of splitting/soloing camps with a bit of effort.
Also, it never hurts to have a necro to make you some plat. Mine has been great for when I'm semi-afk. Iksars will level slower, but you'll enjoy that extra regen that others won't at 60
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I should say (as I've just typed in another thread) that they're not great in Velious, but then there's no extra levels so you'd be fine in vanilla/Kunark all the way up
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My rough levelling guide has been:-
11-19: Kurn's Tower
20-22: Lake of Ill Omen
23-26: Warsliks Woods at the giant fort
26-29: Bard in Feerott (near Innothule zone line - she drops cash, a lot of the others don't). Named sisters in OOT if I could get them.
30-34: Bit sketchy, remember doing some Highkeep guards and Halfling guards too. Some work at the Frontier Mountains giant fort.
35-49: SPECTRES! Go Feerott over Oasis, usually quieter and you can sell in skeleton form to vendors outside Oggok. Can also bank in skeleton form in Oggok.
49-50: Currently 50 and stopped - been going into the back end of Felwithe slaying guards there. 20pp a guard (sale of 2h sword) and chances on FS weps, 2-3pp cash, gems, etc. Fear kite is a winner.
...overall, great for cash camps. Can probably add in Lower Guk for camping some nice pixels as well if you can deal with all the young camp lawyers.