I do really like Amass as a mechanic, but I think it needs to be the primary focus of the deck and commander to shine and thats not the case in the stock list with Sauron
Even though it costs one mana more, it's still a good card, especially as it's now mono Blue instead
Exile this creature at the beginning of the next end step, then you may cast it from exile on a later turn.) Creature Artifact - Jellyfish Robot Mightform Harmonizer Landfall Whenever a land you control enters, double the power of target creature you control until end of turn
And for its low mana cost, it's a very important effect in this environment
You get an emblem with "You have no maximum hand size." 0: Put any number of land cards from your hand onto the battlefield tapped
I'm also a big fan of Homeward Path to deny opposing Blue (Control Magic) and Black (Animate Dead) decks from stealing our creatures