I understand where you are coming from in such a deal - we are trading out Sully for a starting center in Asik and hoping Parsons can be the player we all wanted Green to be (although I have been satisfied enough with Green).
In this scenario, Olynyk and Bass split time at PF and we have a better balanced line-up overall; however, if we can just acquire Asik with the TPE, I would rather do that. Green and [especially] Sullinger have value. Is Parsons worth that value? Very possibly, but it might be worth trying to shore up other holes in our line-up (like at SG) than trading either/both of them for similar players.
The one thing I do appreciate about your threat is that you didn't have Rondo going out in the deal, so thank you for that.