Likable and in tune with what's going on, Davie's game is getting better the longer he's on the island - which makes him a clear threat at this stage of the game. And after playing a hidden immunity idol in the last tribal council, he's shown he's playing hard. He'll need to go just as hard to make it to the final three, but if he does, he should earn a lot of votes.
Never really in the line of fire, Kara may well be able to make it to the final three by virtue of being forgotten about more than anything else. That's not to say she's done nothing to deserve her place among the finalists, it's just that her gameplay hasn't been as showy as that of other players. Still, she does have plenty of friends on the jury …
The screenwriter/actor has played a fairly cautious game, which means one of two things: 1) he'll carefully find himself a place in the final three or 2) he'll do a Gabby and suddenly go full tilt only for it to blow up in his face. If he does make the final tribal council, it's probably unlikely Mike's game would be seen as worthy of one million dollars.
If there's one things Nick's done, it's play aggressively. From his multiple, nicknamed alliances to his ever-evolving strategy, he's been in the thick of the action. If he can continue to be on the right side of the vote, he should be able to make a good case for himself, even if his unneccessary fake idol/real idol switcheroo in last week's episode suggested he didn't actually know what was going on.