So looking around at teams that would make sense for Mitchell and would still be good enough post-trade. These are the best trades I could come up with
Miami - Herro, Jovic, Strus, Lowry, Robinson, 3 1st's for Mitchell, Conley, Clarkson
Memphis - Jackson, LaRavia, 3 or 4 1st's for Mitchell
Philadelphia - Harris, Maxey, Thybulle, 2 1st's for Mitchell, Conley
New York is also obviously going to be interested this is the best I could come up with
New York - Barrett, Reddish, Toppin, Quickley, 4 1st's for Mitchell
Then I have a sleeper team who I don't think is interested, but would be a fascinating team if they did this
Cleveland - Sexton (sign + trade), Okoro, Agjabi, 3 1st's for Mitchell