Love your card! I'd probably do the column starting with "pain" - I've always wanted tentacles, hypnosis and subspace are a great combination (you could maybe even write those as a story and sequel), and pegging! GAH.

I don't have any particular suggestions except that maybe you could go through any old ideas (if you have any) and see if they fit? I came up with a couple of ideas for my card that way (on kinks I thought I'd have a harder time with).