Hey, here's a roleplaying tip straight from my son, who had an elven mage/thief in our 2E campaign...no matter what the circumstances, just charge into battle and attack with your longsword. Forget about thieving skills. Forget about spells. Just worry about swinging that longsword.
Seriously, I never understood that character. I figured he only took thief levels to justify stealing from the party.
His paladin was the same way, too. Heh heh heh. Crazy kid.
Johnathan