Also, how do the Protect Artifacts work? I mean, I know one is for towers. But where do the other three go? You have six phase shields, and three PA's. It seems like Seism will eventually be able to destroy three shields that you put down. Seems like your out of luck without some healing, or more PA's.
How about trying to add 2 more PA's, so that you'll stand a fighting chance. You definitely need some healing, so a duo deck probably isn't the best option. How about putting a few unupgraded Novas in there and changing mark to life? Improved Heal is probably the best option because its a spell card, not a permanent. The Novas will provide the quanta for the PA's, while the mark will provide quanta for Improved Heal. By the time you have to use it, you will probably have enough life quanta to use it several times. Plus, it could get you an Elemental Mastery.
Hope this helps.