And he huffed and he puffed...
Two first round picks for Gibbs is the maximum, not the minimum. A mid range first rounder (ie. Pick 10) probably gets it done by itself, though we'd undoubtedly ask for a little something extra if we can get away with it. A later first rounder would need to be packaged up with something else (ie. Picks 17 and 27). If we can use those returns to improve our side, we should swallow our pride and pull the trigger. On-trading 17, plus our Pick 38, for Kennedy, Smith and a salary dump is good trading, and we take 27 to the draft for someone like Tim Kelly. Gibbs & 38 = Kennedy, Smith, Kelly & Griffen gets the tick of approval from me.
Tuohy didn't walk, he was pushed. Widely accepted that we identified him as a tradeable asset and lowballed his contract to give him a nudge out the door. Used him to secure the first rounder that GWS wanted for Marchbank and Pickett, and if we'd pushed Geelong for a higher pick GWS would still have been taking it off us.
Winning individual trades is a very simplistic approach. Once you'd identified your target (ie. Marchbank and Pickett in 2016, Kennedy and Smith in 2017?) the next step is to do what you need to do to get your players across. Look at our list and picks now, and compare them to what we have after the trade period - that's when you can assess whether we've come out ahead.