Sounds like a game I'd like! :-)
Another thing in Neverwinter Nights I've found useful for getting out of tough situations is manipulating the healing process. In that game you can usually teleport back to your origin point if you need to heal up, and you can also heal yourself in combat with potions or (for paladins) laying of hands. But it's tricky because you have to do it before your hp get too low; otherwise you can get killed before the healing takes effect. So I try to take a lot of healing potions along and heal myself up periodically before my hp get too low, if possible.
Also, with multiple opponents I try to concentrate on killing the most dangerous one as quickly as possible, to minimize the number of rounds I'm getting attacked by more than one.
Hmmm--that's about all I can think of off the top of my head. Not sure how much of that is applicable to RotK, but hopefully some is. I think I need to try that game! :-)
I really like Neverwinter. Wish I had enough time to play it well.