Depends on the rest of the roster IMO.
If Cayden Boozer, Foster, and Sarr all return, I think Nik becomes that super 6th man that plays either forward position. He seems to have a workable shot and is willing to get his hands dirty on both ends of the court. I could see him carving out a role of 25+ MPG and giving the team either a big look at the 3 or a smaller, quicker look with him at the 4.
If Sarr or others leave after the season, Khamenia seems poised to start next year. Over time, I think he ends up as a Jack of All Trades / Master of None type, like a discount version of Kyle Singler if you squint hard enough.
I agree that it depends on the roster.
Let's assume Cam B, Evans, Ngongba, and Sarr are gone. Yes, I know people believe some of them might not be, but that might be more wishful thinking than grounded in the probable.
That leaves Foster, Cayden Boozer, Rippey, Howard, and Harris on the perimeter, and Cam Williams, a portal (or Euro) big to be named later, and Sebastian Wilkins in the big-rotation (Maxime Meyer seems more of a project who probably won't make the regular rotation). Khamenia could swing, either to the perimeter or the interior.
Would Khamenia likely start with that roster? I'm not sure. If the roster looks like the above, I'd expect Foster, Cayden Boozer, Cam Williams, and big-to-be-named-later very likely to start, leaving one starting spot to be fought over by Rippey, Howard, Khamenia, and Harris. If you want to pencil Rippey into the top four and throw Cayden Boozer into the competition to be the fifth starter, it doesn't really affect the math.
The question then becomes whether some other team throwing bags of money at Harris or Khamenia would be persuasive under the above scenario. I don't think it's a lock that either of those guys return to Duke,
unless Coach Scheyer tells one of them that they're likely to start. Which of course would answer the question for us.
All that said, assuming Khamenia returns to Duke he'd almost certainly receive solid rotation (top 7) minutes. Whether that's a starting role, or a 25+ mpg role off the bench, or an 18-to-24 mpg rotation player role is more murky.