Getting Tari back would be huge, but not getting him back wouldn't be the end of the world. It depends on who else Wes is able to land, I expect if Tari doesn't come back Angelo Allegri from UNCG becomes a target. Getting a couple big men transfers will be important.
Without Tari back we'd obviously need to add a lot of bigs very quickly, even with him back we need a lot. I believe JD is going to be playing the 3, which gives us 4 guys (assuming DDJ comes back) who can play PG or SG (DDJ, Saunders, MAW and Mason), two guys who can play SF (JD/Mason) and basically nothing at the 4/5 (JD could backup the 4 and who knows anything about Lakhin).