This is the year we figure out where Smart's place is on the roster. He either starts at SG or is 3rd guard/6th or 7th man. Much depends on how lineups fare with him vs Brown in various roles.
Either way, when you need 4 allstar players to win, he would be the 5th starter. So how much to you have slotted under your cap for each of the 5th-7th or 8th player?
We currently have 3, and always will we can expect, max players. We currently have, but might not always have, rotation players on rookie deals. It might be Marcus vs Brown for starting SG, and competing for a payday as well. Whichever one can't be replaced with an MLE guy can get paid.