Well, I can see how the fractal SoFo deck would be worse with the AI. First off, Shard of Focus is actually quite expensive in a mono, similar in cost to Oty or Charger. Secons, you have exactly 4 cards to fractal, 3 SoFo and a Nymph, none of them very cost-effective. The deck is probably severely underquanta'd.
But the main problem I see is hand clogging. Black Holes rarely need to be played all the time, Overdrives need one of those 4 playable cards, and same goes for Fractals. And thats assuming the AI plays overdrive and Fractal perfectly. (And even if not, hand clogging I mentioned earlier will actually neuter fractals). I'd have to see, but if you're running Fractal Shard of Focus as your main strategy, you need some kind of rainbow. Otherwise it's way too costly to actually play them.
Fun deck ideas, but just mentioning that that last deck might not have been as practical as you're saying it was.