I think druid makes an effective 5th character, after taking fighter, rogue, wizard and cleric. A druid can double as a scout, a blaster, a healer and a pretty awesome melee combatant. I don't think a bard adds as much punch or versatility (although bards are great at lower levels).
Hmmm, perhaps a rogue (for traps alone), a cleric and three druids instead?
Hmmm, perhaps a rogue (for traps alone), a cleric and three druids instead?