Mavs need more self-creators. Wizards need a third big. Barton and Powell are both low-risk rentals. Pinson can be waived on arrival.
This is essentially pt. 2 of how I'd handle the deadline for the Wizards. Here's pt 1: https://fanspo.com/nba/s/wizards/trades/Xt0Uy9A0FosVlJ/wiz-create-roster-spotclips-get-help