Out of those two, I think I'd go for Keldorn, as he seems stronger than Mazzy along the way. My personal preference would be Valygar though. He and Minsc are currently forming my frontline, Minsc wielding Lilarcor and Valygar dual-wielding his Corthala family blade and the Celestial Fury Katana. Supported by myself (an archer) and Yoshimo (I know you hate him ), and Jaheira (as my Jack of all trades) and Aerie for the magic we all need so badly.

Valygar is very lethal, causing bleeding possibly when he hits.

However if you decide to go for Mazzy, who is a sweet little halfling overall, you should perhaps boost her strength a bit and that way make her able to be a frontline tank.

Ah yeah, well you've opened my eyes regarding Yoshimo - Jan, so thanks for that as well.

Not only are Jan's remarks much more fun, I believe in time he is possibly a better thief as well. And with that a nice support mage, so I traded Yoshimo for an equally good thief, and got a support mage as a bonus.

Time for some deliberate butt-kicking!