Imo, Simmons would be at his best if he were used as a Point Center.
- Magic was a PG on offense, but he was mostly guarding PFs on defense.
- Luka is a PG on offense, but he's a wing on defense.
- Likewise, Simmons is a PG on offense, but he's a PF/small ball Center on defense.
Obviously, the Sixers already have Embiid, hence they cannot play Simmons at the 5.
PG Conley (instead of signing Al)
SG Thompson (or equivalent spacing SG who is high level defender) (obtained in Embiid trade)
SF T Harris
PF Simmons
C low cost starter (Baynes, Lopez, Mcgee, etc)
6th Covington
PG: Conley (instead of signing Al)
SG: Thompson (or equivalent spacing SG who is high level defender) (obtained in Embiid trade)
SF: Harris
PF: Covington
C: Simmons
Or how about something like this?
PG: Smart
SG: Brown
SF: Hayward
PF: Tatum
C: Simmons
(assuming we sacrifice Kemba + pick(s)/prospect(s) for Simmons)