I've been busy planning a four-character party, myself:
- PC1: Fighter/Knight (Defensive, Man-at-Arms)
- PC2: Priestess/Healer (Water & Earth magic, Personality skills)
- NPC1: Bairdotr, Ranger/Rogue (Bows, Marksman, Nasty Deeds)
- NPC2: Jahan, Mage (Fire & Air magic, Loremaster)
From all of those, I felt that the knight had the most "must have" talents, which meant he was the most ability point starved. Didn't even have enough points left to make him the main party leader, but could do that with the priestess. The others could make due with less talents, to later convert some to ability points.
If you want to play with only three characters, I suppose you could make the fighter your lone wolf and give him leadership. Alternatively, with only one mage and 5 magic schools available an argument could be made for making them the lone wolf instead.