[DraconisRex]

I've done the Bard/Sorcerer and the Bard/Mage. Oddly, they are very much set-up the same, because of the purpose of the bard. The bard, as I play it, is always the rogue in the party. In order to be an effective rogue, maximum points must be available to increase Open Locks and Disable Device. That means a minimum of 14 intelligence.

As a sorcerer/bard, I tend to increase Charisma beyond the 14 I would use for a mage/bard. As a mage/bard, I go for a 16 Intelligence as a minimum.

The other attribute scores pretty much have to stay the same. You need to have strength. You need to have dexterity. You need to have constitution. You need to have charisma.

Sorcerer/Bards have to watch their spell selection, and you'll find yourself picking up more offensive type spells because the bard spells are more defensive/affective.

Anyway, both class combinations work well. I have found the Sorcerer/Bard is better at offense than the straight bard or the Mage/Bard. While the Mage/Bard is better at utility/defensive magic.