I know some one who uses a Darkrai in MagKiss. It works pretty well. Load up a Magmortar on your Bench while stalling them with Darkrai Lv.X's Sleep. Togekiss justs speeds things up a bit. However, I don't know about Houdoom. Like Blaziken 1111 said, it needs a consistent flow of Energy to keep it attacking. That means that you're only attaching 1 Energy a turn to Mag, instead of 2, and that's IF you get everything set up. Also, Houdoom is kind of a free Prize for Gallade, and Gardevoir ruins Firestarter. So, no, I don't think it would work.