Yogi Bear looks kind of weak. Akk creatures are 2/2, it is relying for
Beastmaster Ascension and
Muraganda Petroglyphs to pump them, yet as soon as the opponent plays something like a vanilla 3/3, the AI won't attack as willingly. While the AI still only gets Vanilla 2/2, the opponent can draw strong 4er and 5er drops, shifting the game total in its favor.
Steely Resolve also badly interacts with
Awaken the Bear, you splashed blue only for Call to Kindred (which may be a strong card, but mind, that it gets shot down fast and the most you can get out of it would be a 3er drop,
Alpine Grizzly)
For me, that deck is easy ...
Mither Smith. It is an Enchantment deck, yet it seems to be missing some cards which have a good synergy IMO. The Opalesence is an interesting idea, but makes this deck far more vulnerable, too (The opponent just needs to play
Mizzium Mortars once, and if the opponent did only control one or two
Honor of the Pure/
Glorious Anthem, half of your enchantments will be crushed.
Otherwise - while the enchantments all became creatures, they are still vanilla. The opponent can block them easily ...
While you would need to splash,
Bedlam could be interesting.
Also,
Sphere of Safety. While
Ghostly Prison is annoying, especially since it hits the board quite early,
Sphere of Safety would soon become such a great cost, that no creature would be able to attack the AI.
What about
Celestial Ancient? It has evasion and grows quite fast. As soon as
Opalescence hits the board, so will the other enchantments.
Similary, one could speak about a
Sigil of the Empty Throne. Though I know that you rather want the enchantments itself to attack.
Additionally, have you tested what the AI searches its library for with
Idyllic Tutor and
Enlightened Tutor...? IIRC it would be the highest converted mana cost card, so it would be
Opalescence, is that the reason you don't want to include other high cost enchantments...?