The ShiftstonedEternal Power Calculator is a deck-building tool that visualizes your odds of drawing enough Influence and Power based specifically on the cards found in your deck.
I did make it to Gauntlet Masters with this deck. I stopped playing Gauntlet after that. For Gauntlet, you need to go 6-0 to get a silver chest, but in Ranked or Expedition, I get a silver chest every 3 wins (every 6 matches). Ranked and Expedition seem better for grinding (up to 9 wins a day, which takes a couple of hours).
One thing I would have added if I had the cards was 4 Oni Samurai. It doesn't make sense to craft commons or uncommons, given how many the game gives you. The turn 1 Warcry unit is very strong against the AI, because once you have a bigger creature than the AI, it stops attacking. Also when playing Gauntlet, your goal is to win or lose fast.
I haven't thought about legendaries. Try the ones you have. I'd probably add cards that let you cover from a slow start like Harsh Rule. I'd probably add markets so I had counters for some of the AI decks.
One thing I would have added if I had the cards was 4 Oni Samurai. It doesn't make sense to craft commons or uncommons, given how many the game gives you. The turn 1 Warcry unit is very strong against the AI, because once you have a bigger creature than the AI, it stops attacking. Also when playing Gauntlet, your goal is to win or lose fast.
I haven't thought about legendaries. Try the ones you have. I'd probably add cards that let you cover from a slow start like Harsh Rule. I'd probably add markets so I had counters for some of the AI decks.