I think the top of the list isn't fun, except maybe Mesmeric Orb. Thief is probably ok because it dies to every red card.
I think the real fun would be like the two mill 3 counters as Cancel alternatives, Oblivion Sower or Mindbreaker/Mindcrusher as a multipurpose threat. Overwhelmed Apprentice as a weak filter spell. Winds of Rebuke, Thought Scour, and Broken Ambitions are all totally decent cards on their own. Grisly Spectacle mills a little for 1.5 mana more than it's worth and Patient Rebuilding is also about 1.5 mana more than the slightly improved Phyrexian Arena that it represents. Wall of Lost Thoughts blocks well.
My point is that the deck would be made up of counterspells, bounce/kill, draw, and finishers. It's a normal control deck with an extra angle to it if you're at a power level where switching some of these cards over makes sense. You can lean into the theme as much or as little as you want. Most of those cards just mill a few extra, but that's fine if your control deck is pushing the game to turn 10+.
I think Drownyard and the Ashioks are for quite a high power level, if they wanted. I didn't even include the Jace with 0: Mill 10 because it's not really a theme, it's just two activations, maybe three.