First of all, split the pillar/pends evenly and lose the soul catcher. I'd then chuck out the virus, flesh spider, boneyard, plauge and aflatoxin, add another skull shield and a couple more poisons and mummies. That's just me though. You can choose to go down a completly differend road, maybe by adding more viruses and plauges and replacing the skull for a bone wall.
What's the winrate in AI3?