Personally, I think Earl and Yao-man will be the tight final two to beat. They both have the clues to know where the immunity idol is and they’re working together to find it. That shows a level of strategizing well beyond your average Survivor.
I wouldn’t be at all surprised to see Rockie and Lisi pair up as allies. Rockie could rationalize that she’s not just some ordinary dame. He might even get a crush on her. And Lisi would enjoy being paired with a man she could slap around.