I've been looking at the Marruspawn from Sandstorm for a while now, and I'd love to use them in an upcoming and very ambitious gestalt campaign, and I'm looking for options(3.PF is acceptable) to apply bonuses to allies or control creatures of a specific subtype (or race I guess could work). Sort of like the inverse of favored enemy.

The only thing I can think of that sort of fits is the Warchief prestige class, which could probably work.

Do you guys know of anything? I don't mind buying books.