Just seems like it's not necessarily the most effective way to use it considering it only works on 2 medals after it, though I don't know all the medals you have access to. I think the best way to use it is to have it come after a generic buff and maybe some debuffs. So something like
It's my screenshot and I like having Maui there.
Pooh/Sebastian -> Maui -> two strong attack medals
Pooh/Sebastian -> HD Axel -> Maui -> two strong attack medals
sounds like it will help you deal much more damage in a single turn than wasting Maui in the first slot. Assuming you have those other medals or ones similar in effect to those.