I don't get the why for Boston. With Smart, Brown, Tatum and Hayward in front of Oubre at the wing, what he gets is Semi's minutes, which is 11 minutes a game and a bunch of DNP-CDs.
I would concentrate on doing a trade to get below the luxury tax. Try to do something to void Bird's contract after the league handles things. Then do what you can to offload enough salary to get under the tax. It is seriously going to cost the owners a ton of money in the future for being a measly couple million over the tax line and triggering the repeater tax one year earlier.