For evil enhancements, I'd drop Misuse of Talents for Two Thousand Horses - does the same basic thing, adds card draw and can be repeated with King Manasseh. I'd also drop Crooked Ways, you've already got a couple ways to check your opponent's hand. I'd think about replacing that with Assyrian Survivor (soul gen + initiative for Confusion/Scattered), which will help balance your EC/EE ratio. Mist is ok for recursion, but I don't know how fast your deck is gonna be to get back to the card. Test it, if you can consistently get that card back then maybe keep Mist, otherwise there's probably something better to put in (Foreign Wives, perhaps, since you've got Mayhem - also, there was a lot of Judges speed floating around Nats, if that's your meta you definitely want FW).
Can't speak to the offense, haven't played around with different clay stuff all that much.
Insta-posted: Balaam's also a good option. Totally agree with Gabe on character/enhancement ratio.
