It seems to be lacking muscle power.
Try 2 gargoyles for dark, 2 mummies for death, 2 cockatri for life and add a pillar. Gives you a bit more strength and resistance to CC (especially firestorm, which annihalates most of your creatures)
You could probably replace the precognition, as I don't think 1 will be very useful in most games.
Upgrades would be alot helpful with some of these cards, but I'm going on the assumption that you currently can't afford them, so that is something to work to in the future.