Just to make it easier to summon, wouldn't having the cluestones and keyrunes from ravnica help with the mana production faster? You'd get the colors you'd need, temporary creatures and you'd be able to draw extra cards when need be. Also if you payed cards like
rescue from the underworld and
endless obedience then you can drop your big creatures into the graveyard and then just bring them back later with less mana fixing. Also if you plan on doing any graveyard recursion then those shoals are gonna need to go if you want to keep your creatures in the game. Honestly there are other cards that give your creatures similar effects and still give your deck the synergy it needs. Just some ideas you might want to try out.