Id change the idea to this: Ok, so the way I'm interpreting all this is:
I reckon the Hanley to Gold Coast trade will play a part, and Pick 44 (currently Gold Coast) will find it's way to Brisbane.
We then trade Dunn, 2017 1st Round Pick & Pick 29 to Brisbane
Rockliff, Pick 19 & 44 then come back to Melbourne
Melbourne then trade Pick 29 to Essendon
Hibberd & Pick 41 to Melbourne
Melbourne then trade one of Picks 41, 44 or 48 to Hawthorn for Lewis
Alternatively if we could trade Pick 44 & a player (Vanders/Nibbler) to Essendon for Hibberd that would be ideal. We could then trade 48 for Lewis and take 19 to the draft!