This is pretty fast and mindless games in gauntlet.
If you live early you basically just overpower any deck. Gnash in the board for the flyers decks. Nahid's Faithful over Teacher may look like an odd choice, but getting to trigger Ark and also having lifesteal is very important to the survival plan. I was torn between Annhilate or Suffocate, because we just want 2 cheap removal cards in that slot. I ended up on Annhilate because our units are going to get big and the AI will team block and give us blowout potential with the instant speed removal.
I've seen quite a bit of other Rat Cage and Waystone Gate decks - but many of them play cards that are individually very weak and only strong with synergy. This deck has very little cards like that, which is what I think you want in gauntlet.
My first three runs cleared the boss. I had a bit of a scary moment with the new unseen skills deck because they got fliers out quick and commando grabbed berserk to push my health pretty low. Shardbinder onboard and a Waystone Fragment off the top pulled me off the edge. I'm very surprised more people aren't playing Shardbinder + Fragment, the combo is very strong.