We will see how the consistent rotations shake out.
If the 2-4 is him, Kadary and Scott in any combination, which I hope we see a lot of, then I could see where RJ would be guarding 2s. Scott to me is the most equipped to guard the bigger forwards and Kadary will be given the lesser threat of the other two wings so he can roam around and avoid fouls. Kadarys best attribute there is as a help defender using his hands and reach, but the same could be said for RJ.
If it’s Dunlap, Luis, and Scott. I would see Dunlap as the last option for guarding the 2, and again would lean towards Scott guarding the bigger option.