Pitching for a pile of decidedly average players? Dying to be the Denver Nuggets of the East? By all means.
rondo/west
ray/mayo
paul/green
kg/green/mid level guy
al jefferson/j.o/shaq/vet min guy
not exactley the denver nuggets
By using JO, KG and Ray's expiring contracts, they would no longer be on the team.
I would take them for free like in your scenario to come off the bench, but that's not possible.
So I wouldn't give up KG, Ray, and JO for that group of players.