I like C2 slighly better for hitting all as a general thought. I can see the possibility that a stronger hit 3 to take finish those 3 could help. I’d probably play around with it to see what damage those three do. If Evelyn + Grace + C2.Elkanen can the three your targeting, then that set up works. If Evenly + Grace + C1.Elkanen doesn’t kill all three it’s the same. It’s really only a difference if C1 does the finishing.
I would not emblem nor leveling Justice and Celidana. The. Are SE fodder, jold on to your Darts, better heroes will enter your roster.
The others are all ok or better.