Rdm Phalanx kicks the crap out of Blu's Phalanx, but, Phalanx isn't a terribly relevant thing these days, it was, once upon a time, Rdm debuffs better than Blu, but none of the debuffs are terribly notable either. Rdm has more MP control than Blu, but again, not really a necessity, and Bards do it better.