I really wanted to try a 3-5 color enchantress based around Solemnity/Mystic Remora/Illusions of Granduer and Donate. Any Seal or Bounce spell ends the game after a Donate, and Solemnity lets you break Remora and Illusions while stopping Ravagers and Ballistas. Obv WGU base, but could add red for Pyroblast and the new kitty Donate. Black could be for Tutors, and the DarkDepths package possibly?
This also has allowed me to test Ancestral Knowledge + Argothian Enchantress + Solemnity, which I have to say has been pretty nasty good. Enchantress even has a reducer now in Herald. Lots to try and test, but enchantress is possible now I think.