Although I'm speculating based mainly on what I've read, for example...
https://www.rockmnation.com/2018/10/30/18041196/mizzous-wings-basketball-kj-santos-christian-guess-torrence-watson-jontay-porter-cuonzo-martin
Santos has the athleticism and mechanics to be a deadly 3-and-D guy for the Tigers, and I think that’s a realistic expectation for him. Santos wasn’t a knock out shooter at Illinois-Chicago, but he was good enough to think his future may be as a sniper with a lot of reps. And his natural length could create match up nightmares at the college level.
The added bonus is that Santos seems to be a great finisher at the rim. It may be too early to expect him to develop as a ball handler so he can get to the rim, but closing out on his own shots and staying around the rim will give him loads of opportunities to pick up stray buckets, especially against smaller teams. Of course, this is all hanging on the, “assuming he stays healthy,” part of this question, which is about as far from a guarantee as you can get.