I think if Essendon wants him they need to get the deal done fairly early. Stringer may nominate Essendon, but if there is no chance of returning to the Dogs the longer trade week goes on the more worried he may get. If other clubs are circling and putting up good offers regarding picks, then he may jump ship if Essendon muck around and it drags to the last day.
Honestly though I am not sure if he should be the target, would be a great get provided we land a big bodied inside midfielder. If it is him alone and we have to part with pick 11, it means we have not really strengthened our midfield, unless a free agent is secured.