I agree that Tai torpedoed any chance he had of winning with his performance at Tribal. He went from odds on favourite to he'll make it through next week thanks to his idol, but he will be lucky to get any votes from the jury now.
I disagree about Cydney, she plays very selfishly and doesn't compromise. I think she might find it hard to win votes due to the fact she turned her back on Brawn (not that I blame her) and then Tai. She does what she wants, and how she likes. She isn't overly endearing to the rest of the group.
Aubry's game is the best right now. She might not agree with anyone but she finds ways to work with them, and gauge the group mood and goes with it. If she had been 100% behind Tai, she wouldn't have heeded Cydney's desire to oust Jason. (Which was poor game play as he was beardy-gruff goat I'd have taken to the end.)
I only know Joe and Michelle exist because somehow they keep popping up now and again, despite doing nothing on the show.