Blue Mill 17 works pretty damn well. I was more of a fan of the blue build that played combat control and could turn a game around in 1 solid combat. Someone played 17 in the first worlds and his decklist was close to mine.
For 18, I had alot of fun with her back in set4 days using Adept, oddly enough. It was jank I'll admit, but I had fun with it. I also made Adaptive 18 and used devouring drills to level but now if I were to try it I would go the unleashed route with like, Dressing Room attached. Making her base 0 damage attacks hit for 5 felt awesome. (Aura and A.Attack Drill plus mastery)
For current 17, you can jump on retro and lookup that ladyboy who is 17's #1 fan on retro. She apperently does well with his non-fanz stack.