The RW variants see some play, and have made me double take a few times as I gather data for the next metagame update. They give you a much better Tron and Amulet titan matchup, but there’s no real change to the Uro matchups and they’re pretty dead against Prowess. I think RW is a meta call.

As for UW, you’re so close to being straight Spirits as is that in most cases it’s better to just go all in on being Tribal. I remember one time seeing a Spooky Taxes deck, but it was far more Spooky than Taxes, so I classified it as Spirits. I don’t think there’s enough advantage to adding Thalia to deviate from straight Spirits.