[Sannom]

Well, I can only say that Mazzy is indeed a better choice than Minsc, since she is basically made for ranged combat with a short bow! She is not an Archer, but she is the closest thing to it that a Fighter can achieve. If memory serves, Valygar is more done for melee, since he has a sneak attack.

Nalia could make a decent "pure" mage, if you want to stay on the Good side. And she won't quarrel with Minsc.

As a matter of taste, I always prefer Jan Jansen to any other Rogue in that game : he fulfills the utilitary role of a rogue well enough, and he adds a little bit more of a magical punch. But hey, Yoshimo is good too.

Keldorn, Minsc, Jaheira AND your character, I think you should let go of one of your decent melee character and take a second arcane spellcaster.

So here is what I would do, a minima :

take out either Minsc or Keldorn and take Mazzy in. Keep Minsc if you like funny and damage. Keep Keldorn if you like big weapons and damage.

For a little bit magic, take out Yoshimo and take Jan Jansen in. But that's all about your personnal taste. And Yoshimo is better at ranged attacks. So I think it will be a "no".

If you want two good archer and one not so good... well, the obvious : make your character an Archer and take Mazzy and Yoshimo. To complete, take either Anomen or Jaheira for healing duty and decent melee, Minsc or Keldorn for big melee, and a wizard (Nalia or Edwin).