Eh, the whole 5* thing is slightly overrated here compared to other games. I have a Gil friend who has reached the highest ascension, yet when we fought the bonus Berserker in Fuyuki, he died first while my Uncle Vladdie (5*) barely survives and my Protolainn (3*) killing that Berserker in one-hit with his NP...all while barely wounded, if at all.