I usually stick to the one I consider the weakest, but if it's a lost cause, I might end up voting a different song in order to save a song I like, which I know is gonna get some votes. So if it's a tight race between song A and song B, I wanted to vote for song C, I might vote for A or B depending on if I want one of them to survive another round.
As for this survivor, FOABP is my favorite PT album and one of few PT albums (together with Stupid Dream and Signify) that I would consider amazing from start til finish, so I'm not too bothered by the results. All these are great. Would have loved to see Sleep Together in the top2, but sadly that ship sailed.