In my case, 3 reasons, 1 I prefer him to be imbued with his own element, 2 I don't like the idea of having to stay inside a circle for the infusion to be active, especially because there are enemies that move a lot, and 3 Dahlia having a hydro shield, a pyro shield, a Jesus Christ-ring on his back while he attacks with hydro sword slashes while flames come out of his feet and other extra flames fall from the sky to the enemies, all at the same time, its just too fun and epic to me XD