I think between the Sheed thing, Perk and BBD, S&T for TA, S&T Scal to make salaries match, and MLE - we have a lot of ways to change the role players around big3+1.
Assuming nothing drastic - C's should target a wing that can both defend and shoot off the bench - Battier, Dudley are two I like. They can replace 80% of what Perk brings to the table with a vet signing if needed - I'd rather see him stay and think he'll be in form by mid season anyways. They'd do well to find a big with a post game - getting some easy buckets with the second unit and preventing the clogged toilet with the first unit. I'd love that to be Jefferson - but am open to any option for a guy who can score in the block. Then they should look to combine the rolls of Nate and TA - if it's true that West might be an FA, get him, otherwise keep looking for a combo guard that can defend and drain 3s.