This is just like the episode in Caramoan where the 3 Amigos were all potentially ImmuneReynold won Immunity
Malcolm had 2 HII and gave one HII to Eddie
3 Amigos said they were voting for Phillip and Phillip told Steath R Us go to ahead with the vote split plan for Malcolm/Eddie to force them to play their HII's
Assuming Tai gave Jason back his HII as Jason said on Twitter then Tai could put on his HII and Jason could give his HII to Scot and all three will be potentially immune.
The 5 can either split their votes 3/2 and hope Tai/Scot do not play their idols pre-vote reading but they are in danger of Tai/Scot combining their idols to cancel their 3 votes after they are read.
So more likely the 5 are going to have to turn on themselves.