@ bloodlover: Soloing a rogue is a little harder but you can do one of two things at least up to higher levels. I sometimes set my cleric on fight mode when just clearing an area for slayers. Turn it off if they are taking too much damage. That way they draw the agro and I get the backstab bonus that often is the kill hit.
You can spend some turbine points and get a fighter then have a healer as well. I put a few goldseals in the bank and used them just for quests even if they were below level. The game however is not kind and soloing higher levels becomes very hard as a pure rogue.
@ Dte:

Hey, I have a rogue, cleric, and monk. Only 50 are fighters.