I would change the photons for Deja'Vu's. Yes, that means you will have to wait more to mutate them, as you will most likely have to wait until one supernova to cast and duplicate one of them, but after they are cast and duplicated (1 supernova does that. 6 supernova, 6 deja-vu's, 12 critters.) it's another mutation critter. However, there comes the problem where you can't mutate them, but they just keep attacking for you. It's more critters in the field.
If you don't like the idea, to fix the fact you don't get pendulums, I would take out 1 Supernova, or 1 anything for that matter, for one pendulum.