If I could see Žižić and Šarić play together for the Celts next year, I would probably become catatonic from the amount of happiness. However, with all of the injury concerns that the 76ers have, it is tough to trade Šarić since Simmons isn't back and is 7 months away. Also, AB is injury prone himself so add that to the equation. On the other hand, AB is the perfect guard to complement a guy like Simmons and even Embiid. He can guard 1s and 2s, and stretch the floor while BS operates as a PG.
Šarić is the 76ers Smart, and he would be a great long-term upgrade on Amir and JJ. His 3pt shot will improve, and his contract is finger licking good. You never know.