As I said, Brahma has guaranteed combo. Turns out that means that she has something like +60% Double and +90% Triple, but only 40% Triple can activate.
So. And? How many guaranteed Combo Hime do you know of? How many of them can you stick into one team? I'm pretty damn sure that the advantages of giving your entire team +Double far eclipses the losses of a single guaranteed combo Hime. Even two.