Here is my trade idea:
Richmond trades Tuck and pick 26 to Freo for Polak and pick 13. So we end up with Polak and picks 8 & 13. We then try to trade up with Brisbane to pick 3 for picks 8 &13. We would also try to move on Krak for a second rounder. So in this scenario we would end up with:
Polak + picks 3, 28ish, 42 etc.