If a deal doesn't get done by start of Summer League and DC shows out, I wouldn't be surprised if suddenly the offer changes to Monk or DDR for Kuminga.
I still wouldn't throw in any 1st rounders, but I would be willing to add a 3rd 2nd round pick. Keep DC and send out a redundant vet (Monk or DDR) and a few 2d round picks for Kuminga.