To save this thread I'll say this. Slith! Now you're going to have a longer time mastering skills but once they're mastered you'll be fine. Auto trip isn't a factor at 50? How many times have I seen the fire giant warrior that no one could beat it seems end up being taken down by a slith warrior because of him being trip locked the entire battle? You also have an extra attack to throw in there with the tail. If you do go slith think about this to, a good slith can hide anywhere, so if the cleric you smashed up yesterday happens to be in the woods with you chameleon yourself and boom you're hiding.
A neutral slith really isn't that great these days, the ability to swallow corpses was much better when resurrection slowed the con death of goodies/neuts. Evil, now that's the ticket if you plan to fight openly for a longer time. Being able to get rid of dirt faster means 1) duh you can see 2) Instead of bashing again or using another ability they might have to stop that tactic and kick dirt again! A human is only better training wise as a thief. By the way we should bring back the old sliths, I miss em.
Edit: In case you didn't know, Chameleon doesn't allow you to move so don't plan on sneaking through a forest or anything.