Board Thread:Questions and Answers/@comment-24665201-20180502134328/@comment-32271305-20180502144431

STR Rosé give +3 Ki to everyone on his rotation. On a double Rosé team, all you have to do is keep one Rosé on each rotation, and everyone will be able to super attack very easily. The only requirement is that every unit must be at least Z-Awakened for his Leader Skill to work.

(During a battle, the units that you put in the first two slots always stay together, while the one in the third slot comes back one turn later, that's how rotations can be managed.)