Clerics do very well soloing undead. If you search with google or the forum search you can find a cleric solo guide. I found 19-39 to be especially nice as a solo cleric in unrest.
Like others have said, if you want to group, I'd suggest small groups (2-4 people) in a dungeon instead of some 6-man group in oasis or OT or something.
Also, you can do whatever race you want of course, but I have to put in a suggestion for halfling. Hide and sneak on a cleric is so very, very awesome. A little quicker leveling doesn't hurt either!
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[59 Troubadour] Fischsemmel (Human)
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