If Ozzy\Amanda\Cirie exile Alexis before the IC, that is the perfect move to maximize James\Parvati's chances of surviving TC should they lose. They need only pick up Eliza, Nat, or Jason to win the vote, none of whom are a block like Alexis\Nat. And we know from the Insider that Jonathan (and presumably Eliza) were closer to Alexis, while Parv was\is closer to Nat.