u/N-I-G-H-T-M-A-R-E_

So for main dps Evernight I heard that Cas sig is better because of the def ignore and higher base hp but I wanna know if theres any nuance better them seeing as her sig does give her energy every memosprite blast.

So, does the faster ult generation with her sig matter in any way?

Also how do superimpositions affect both of their performances?