I'd draft Fultz, release Zeller, Amir, Jerebko and Mickey. I'd try to resign Gerald Green and James Young as our 3rd string wings. I'd then hand out Olynyk a 4 year 48 million contract (no increase by the years so it would be 12 million a year). Then I'd sign Bradley and Smart to a 4 year 76 million and a 4 year 50 million extension respectively. I'd try to sign a PF like Ilyasova to a 2 year contract not worth more than 22 million with a player option after the first year. Then I'd use the room exception to sign a guy like David West or Mo Speights (4.3 million iirc should be enough, they are on minimum deals). Also I'd engineer a trade for Rozier for some minor assets to clear space for Fultz.
Lineup:
IT, Fultz, Jackson
Bradley, Smart, Young
Crowder, Brown, Green
Ilyasova, KO, Yabu
Horford, Zizic, West/Speights
Imo it is a deep team with a lot of young untapped talent that can develop and help us over the season with a good amount of proven vets that can contend.