Perhaps 76ers recent issues and ours can be fixed with a trade that can be beneficial to both teams
Celtics get: Simmons, (salary filler)
76ers get: Brown, Rozier (S & T), return Sac 19 pick
I guarantee Stevens can get the best out of Simmons (most likely playing forward) and he can help will rebounding issues, drawing more fouls and attacking the paint. His presence would reduce the burden on Irving and given how many elite shooters we already have, his spacing issues wouldn't be be an issue on our team.
Philly solve all their issues with this trade as the have a more scoring depth, better 3 point shooting and it unclogs the lane for Embiid.
I'm sure this is a contentious idea but IMO it has validity as a plan b.