Those three would probably mean starting Ikitau at 12, as would having Sua'ali'i at 13. A combination that keeps Icky at 13 could be, 12 Feliuai, 13, Ikitau, 14, Sua'ali'i. I do believe JAS has to be there somewhere for the skillset he has and my preference would be at 14, so 12 then becomes critical to the equation. Feliuai is probably the most robust of the 12s currently, tackles strongly and carries hard. He has issues in that he lacks a lot of experience at Super level but is contributing to the performances of the best team, best backline attack in Australian rugby atm. Remembertoo, that he has been named in Schmidt's earlier squads before withdrawing for personal reasons.
My backline on current form would be Tate/Lonergan, JOC (James O'Connor) (James O'Connor), Daugunu, Feluiai, Ikitau, JAS, Wright. Just about as big as we can put out right now and all players in form to warrant selection.