Temporal Trespass and Part the Waterveil just don't help, I'm not filling up the graveyard with Fetchlands (can't afford them, that's why I have the worst mana base in existence) and spells, and I don't have room for it. It's not achieving anything either, with my general inability to cast it.

Torrent Elemental seems like a cool idea for the deck, but you don't have anything in the deck layout to make use of his ability to comeback to play if removed. You lack any delve cards in this build or any cards that would otherwise remove it from the game. It seems more like a side card for dealing with decks that do heavy removal. I would suggest taking it out in place of faster high defense cards, or more draw/Dark Petition to help get to assault formation.

Like the deck concept. You might want to update description of deck since you aren't running Murderous Cut anymore.

Silent Skimmer would be a great addition for this deck due to it dealing 2 everytime it swings in addition to the 4 damage it could deal, having invasion is perfect for this deck because there is no flying other than sliumgar.

love the deck, lol wish i had this much help. ive seen a lot of Assault Formation decks and one thing is clear, you need more draw power. id recommend Treasure Cruise. hope this helps ,cheers.

I used to play Assault Formation since it appeared in the format. Before roation of Theros I also used sultai version, with Phenax, God of Deception as alternatvie win-con. Now I turned to version with Kiora, Master of the Depths as a plan B.

I strongly advice you to try Mirror Mockery with Sidisi's Faithful and Profaner of the Dead. The first one is perfect, hyper anoying board cleaner for first turns, the second one is destroyer of all token-based decks or aggro decks with low CMC's. The very same thing comes for Displacement Wave, all of those really saved me couple of times ;)