For my money, I'd probably pick between War Weaver or Bard. You're already contemplating things that add spells to your list. At that point, I think an arcane War Weaver, with some healing spells and a few other spells cherry-picked would be a substantially better buffer with his spells than a Bard would be.
On the other hand, an optimized buffer Bard is, in its own right, a sight to behold. So, that's good, too.
Kind of like what A_DM_G said above, I think you're not going to be thrilled with this hybrid approach. Assuming you really want to play a Bard, I'd go for an optimized buffer Bard. They come prepackaged with healing, and you can throw some character resources at augmenting that as well.