Before we start, yes of course it doesn't have nearly the optimization options as a Cleric or Druid, or as an arcane gish character. That's not the point. A friend wants to play one, and alongside a Warblade and Rogue his character is less likely to overshine them when compared to a Cleric or Druid, which is a plus. He wants to be a support melee character with some buffing capability, and some crowd control capability.
I'm here asking the min/maxers for advice on feat selections and spells. The build is most likely going to be Spirit Shaman 6/KotR 6, and probably won't have any variation on that unless something really amazing is suggested by someone here. Feel free to reference anything from literally any book you can think of. Oh, and thanks in advance.