The problem is the 14 million of filler needed. The sixers already lose the better player in the deal AND they have to find 14 million of filler to get it done? That means they have to give up Danny Green and/or Seth Curry just to make it work. That's why any Russ deal has to be a three teamer that would also entail somebody taking on Tobias Harris.
I don't think the Lakers would have an issue trading Westbrook for Simmons and Green or Curry.

Seriously though, I agree it would have to be a 3 teamer.