If the Raps lose this series convincingly, where can they realistically go from here?
I just don't see how you can bring back Lowry and Derozan for Year 7 after that. This is very obviously the peak of the Raptors as they are constructed.
I would trade Valanciunas, Lowry, and Derozan for whatever I could get. Be mediocre for a few years but build around the young bench guys.
VanVleet, Wright, OG, Siakam, Poeltl is not a bad starting point.
Trading Lowry, Derozan, Ibaka, Valanciunas may not be easy, but I'm sure it can be managed if they're OK not getting any major building pieces in return.
I'd keep Casey.