The Once and Future King (Midway Grail)

I like the ICE suite, but IMO, you'll need more econ in order to get the engine running. :)

More economy than Encrypted Eves and Adonises being recurred via Architects?

If they were free to rez, then it wouldn't matter. You're relying on the runner to not be able to find his Mimic or Cujo or whatever to make Architect extinct after the first firing of the subroutines, and in the meantime, they'll make you poor by causing you to rez other ICE. You need money to make money, and if the assets are trashed (I understand your synergy, don't get me wrong here), you're going to be hurting.

I do like the inclusion of Midway Station, though, and that alone makes me curious enough to playtest this. :)

If the runner uses Mimic, it will cost him 4c to break through a Midway'd Architect.

I still think you could use something like 3 Green Levels or maybe Successful Demos to go along with your MSG tax synergy.