C's - Stephenson via S&T (probably look to add a pick or two from Indy as well)
Pacers - Dragic
Suns - Rondo
I actually like the versatility, size, and toughness that a 3 guard rotation of Smart, Stephenson, and Bradley can provide. Bradley and Stephenson are both only 23 and will only continue to improve. All 4 will be locked in for at least the next 4 years, so roughly 22m spent on all 3, which is reasonable especially when considering the max, or near max, deal Rondo will look to receive next summer.
I also think that the only reason Bird would bring Ainge in to the 3 team deal is because he knows he has, or has had, interest in Stephenson. Conversely, the Suns probably have none in him.