Hypothetically, let's say we finish around 10th both this year and next year (hopefully better, but let's keep it this way for this hypothetical scenario).
This would have us net picks ~8 and 26 in both this year's and next year's National Drafts.
Let's add to the theory that GWS might finish around 8th in both 2015 and 2016 and have picks to the approximate level of 10 and 28 in the same drafts.
With Treloar, I would propose that we give GWS pick 8 in this year's draft. If this isn't good enough alone, I would then swap our pick 8 (2016 draft) for their Pick 28 (2016 draft). You obviously run the risk of us underperforming or them overperforming, but the reward of netting Treloar is probably worth the movement of a few picks.
This way, instead of only having one pick (Pick 26) in the first 2 rounds of 2016, we would have picks 26 and 28. You could either take 2 players with these picks or try and bundle them together to get back into the first round. Obviously this would depend on the strength of the draft and how many players we needed to add.
I would also say we offer up Pick 28 (2015 draft) and a player for Aish. Usually you hear Hine saying "Player X or Player Y was Pick Z and is performing lower/equal/above this pick." You could argue that Aish was Pick 7 and is performing below this pick, as, injuries aside, he was not necessary holding his spot in a team who has finished bottom of the table two years in a row, and so on. We can all take guesses that the player might be a Seedsman, Oxley, Kennedy type player.