I wouldn't much say that they have to become a unit together. Any of the two young guys developing will do. It doesn't have to be Russell in particular. I think Ingram is a given to develop. He's had more progress in three months than any of the other young guys have. He's coming along quickly.
For me, Russell yields you much more in a deal if he's paired with an albatross contract (Mozgov or Deng).
Why trade a player with potential when we are years away from competing?
Let the kid grow! If Ingram should control the offense, that's for Luke to figure out. Russell can play an off ball role. Shooting is what got him to the NBA. His confidence just isn't there right now but we've seen what he can do when he believes in his shot. Trading Russell would be a huge mistake.