Some results: Feodum Masterpiece flattens Delve Feodum (no shit), but Delve BM is nothing to sneeze at. It picks up first Province at about T7, 4th Province by T14. The Delve bot I made with this has not bought Gold, though I'm sure I can increase the win % if I include Gold. As it stands, The simple Delve BM I wrote beats the optimized JoaT, but that shouldn't count for much when that bot is not buying Delve.
another edit: Buying Gold at all is bad for Delve BM. If you're going Delve BM, just buy Silver en mass.