This should give you the requisite number of mana sources without diluting the multicolored card count too much
I did have a Miirym, Sentinel Wyrm Commander deck briefly, but I didnt like how overpowered it was to have a card that powerful sitting in the command zone
Chivalric Alliance We have some new card advantage in White with this enchantment
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Being the token deck at the table we can forgo most of the mass removal ourselves unless its one sided like Mizzium Mortars or Cyclonic Rift
It is also one of the least dead cards for any given situation resulting in a card that I will never leave out of an Izzet deck should I have the option to play it