Flashfreeze is probably a fine card for Mono-Red and any Green stompy decks that pop up in the future
Once the ability resolves, the bonus applied by that instance of the ability doesn't change even if the number of permanent cards in your graveyard changes
Calix, Guided by Fate and Hallowed Haunting are interesting cards that get better the more enchantments you play, and that naturally includes enchantment creatures
On top of all the mill support you can get from your spells, you can win by generating a large amount of mana and activating Syr Konrads abilities
The rest fill roles like songs, items, and a couple of locations if your plan uses them
Bruvac the Grandiloquent No list of blue commanders is complete without a mill option, and Bruvac the Grandiloquent is one of the best