Of the 3 it's going to come down to depth at position.
1. Koroma - if Alex has to come out (fouls, fatigue, coach talk, minutes capped, whatever) - if Stewart is on the floor, Koroma has a good chance to slot in for a few minutes.
2. Millender - tougher - has 4 guards in front of him, so unless Hurley has to yell at 2-3 of them at a time, this will likely be mop-up minutes.
3. Jacob Ross - He is currently listed at 6'4" and a shooting guard where Solo and Mullins are ahead of him. If he continues to grow like his brother (who also was a guard) - he will be a wing behind Stewart, Furphy, and his own brother.
So of the 3 I see Dwanye Koroma getting the most minutes.