I would go along with an Amir/Jerebko/Rozier/BOS 2018 1st for Millsap trade. My ultimate endgame would be to sign Hayward, assuming Durant is not available.
2016-17 rotation
C/PF - Horford, Millsap, Olynyk, Zeller
SF - Crowder, Brown, [trade deadline vet]
G - Thomas, Bradley, Smart, [trade deadline vet]
(out of the rotation: Green, Young, Jackson, Mickey)
(stashed elsewhere: Zizic, Yabusele, Nader)
2017-18 rotation
C/PF - Horford, Crowder, [FA backup C/PF], Olynyk
SF - Hayward, Brown, Nader
G - Thomas, Bradley, Smart, #1 pick
(out of the rotation: Zizic, Yabusele, Jackson, #35 pick)
(gone; Millsap, Zeller, Young, Green, Mickey, trade deadline vets)