[Neomi]

Nerull, you should definitely try a single-class thief or maybe a fighter-dualled to thief. I did this one time for the same reasons you've mentioned (relying on a warrior heavy style and ignoring the benefits of a thief) and found that my thief actually got many of the kills and could basically deal with some encounters entirely on his own.

Example: set up traps outside of the enemy's sightlines. Down a potion of quickness, enter shadows, and position yourself behind the most dangerous yet vulnerable enemy (i.e. the spellcaster). Then, open your battle with a backstab triple-quadruple-or later even quintuple damage (splattering him across the room before his stoneskins went up) -- it's like cutting the enemy off at the knees. Of course, then you run very quickly out of sight, leading the enemy into your traps, back into the shadows, and repeat. There really shouldn't be much left for the tanks to do!

The reason I say dual fighter-->thief is really for the HP bonus, ability to grandmaster, maybe an additional attack per round. The same reasons that Anomen is a better overall cleric because he has some fighter levels. This character will quickly get his fighter attributes back and will level rapidly to achieve the thief HLA's.

Of course you could do the multi-classed fighter/thief which at high levels is probably even better than the dual class.

Enjoy!