Uriel will really shine once Awakened. Until then she's just ok, but should be better than Acala. Uriel can Burst for 2mil in the DMM version, which is 1.8mil more than my best Water SSR. But you'd have to drop someone other than Acala to make room for Mars, so you can pass on Uriel if you want. If Mars wasn't available, you'd have to find some other element to spend you Miracle ticket on.