Ok, I'll do the pillar/pend split, but I think the pillar and mummy amount is fine. I'll try it out and see if the extra mummy helps.
The shields can slow the games down, and you could take them out if you want to and replace them with a mummy, a poison, and a dragon (or another arsenic). I personally want to keep them in the deck I use, but I could post an alternate version without shields.