Guardia's Bard guide should go just fine for what you're looking for.
read it here:
viewtopic.php?f=5&t=88001but tambours, dances (magical damage), mana cycle / orbit, moving / swing march are about it for parties
Unless they fixed this, with 3 bards in a pt, you can stack dances (even higher magical damage output) and you could have guard tambour, mana tambour, and hit / clout march up as well ...