I think it's getting to the stage where it depends on the routines given out, as talent and skill are reasonably uniform across the board, with the exception (I suppose) of Hayley.
T&D have given Danny and Danniella some properly awful routines up to this point, and if either of them ends up with another borefest then they could both be vulnerable. Kieron is fighting with Danny for 'journey man' tag, and if he ends up with the duff routine he could make the bottom two, no matter how well he performs.
I think there'll be a push to make Gary interesting this week on the production front, plus he's got enough skating skillz to be given OK routines most of the time, plus his fanbase is massive, so he should be all right.
However, I'm going to go for a shock LL prediction and say that Hayley will be in the skate-off this week. After the 30, people are going to start assuming she doesn't need the support...