Need help in CB progression

Hello guys

My CB team: Ninja, Uugo (for leach and heal am disabling her A2), Apothecary, Giscard ( att down and inc att and deff ) Frozen banshee.

I've pulled rector drath few days ago & I've ranked her up to 60 planning on using her for cb

I need help for CB progression, I can 2key NM except for force affinity .. on UNM I've manged to deal only 13m per key.

am trying to progress to UNM
any advice on team combination or gearing?

also am struggling which champion to 6star next?

I appreciate your help ♥