A couple of major problems with your scenarios :
1) A trade of westbrook and the #3 for the #1 would require the thunder to take back another contract or two.
2) Warrick isnt under contract and most likely will be worth about a mid level exception and conley is signed for about 4 million per the next two years so basically you are asking Memphis to take back 8 million in contracts after they just purged themselves of a bunch bad contracts. it isnt going to happen.
Im sure you already figured that out though.
