Evicting Mark or Winston would just leave the other to win. As a new housemate, I would probably focus on creating the least waves so I could maximize my chances of staying and increasing my exposure (as I would not expect to win the whole show).
Evicting Mark/Winston could lead to some backlash from the house and the voting public. Evicting Steven or Kim would lead to backlash in the house from the one who remained and Helen (though it might create some goodwill with the voting public, I think it would be diluted because there are three of them making the decision).
Getting rid of Danielle for a being fake would probably only lead to backlash from Ashleigh (Mark, Christopher, Chris would just accept the eviction as being part of the game). It doesn't seem like Danielle is particularly popular with the public (or BBOTS) so I think the audience would accept her eviction as fair (especially given that her story arc has been completed this week with her being revealed as a fake).