Leveling after 20?

[LordRayken]

So I hit 20 on my Warrior. I've been doing a lot of leveling in Oasis and when I can get it, Guk. Upper Guk was pretty hard to get groups in and I mainly leveled off Orcs and alligators in Oasis. But now that I'm at 20, I really need some advice on where to level.

Is there like a listing of best places to level throughout the game? I haven't played since 2001 and I really don't remember where I went. I think I had a few level 40-50 characters back then, but I can only remember doing Lake of Ill Omen around 30 and some other zones.