Just a general tip for CCing - always focus on the HAT team first. Healer+Attacker+Tank.
I will recommend you skip soma if you can gather 200 DC crystals fast enough for spica. You really only need 2 archers and we happen to have access to 2 of the top 3 archers. Nanaly-Spica-Bashira. Not forgetting you'll need 6 silver archers to CC both of them and even more to awaken them. I managed to complete crystal keeper H with a lone CCBash archer + random ranged, so gathering 200 for spica should be doable with abit of luck.

You might wanna start focusing on the gold units you have for CC, because most gold units have application even post-AW unlike silvers.

5. Someone has a colourful imagination