Fruits Nozo is lb3 and Chase Setsuna is lb4. I used to think SRs are useless so I never strengthen them after getting the costume, but after seeing Japanese players score 10m using a full team of SRs, I've started to use my macs on SRs that are in lb3 or more. Nozo buffs Elegant cards, while Setsu buffs it's strategy unit. Will try this on Natsuiro after the event.