I think were still a top 5 team unless we lose Flagg or Proctor. Flagg is obvious. Proctor is our best perimeter defender and always shuts down the oppositions best player.
I think all Duke fans see this as a magical dream season and if it really does get messed up by a fluke injury than that will hurt so bad. But regardless, we still don't know the extent of Brown's injury, and we still have the luxury of having a 5-star Center as a backup in Big Pat. A case can be made that Big Pat is a better offensive player than Maliq, but obviously Maliq is an insanely elite defender who can't be replaced.
Just a total guess based on Twitter comments and reports from "doctors on twitter." My prediction is Maliq is out 4-5 weeks, that puts him due to return the opening round of the NCAA tournament. Just a complete guess. The good news is with a shoulder injury, he can still do cardio.