This deck maintained a 60% win rate over 80 games from Gold III to Diamond 2.
Armory style decks are a rough match-up. Try to Rain of Frogs their weapons and save Lightning Strike for their faces.
Mulligan for removal: a Lightning Storm in the opening hand is usually very helpful. I prefer two. A Harsh rule is also nice. If you don't have at least 2 pieces of removal you should really consider throwing that hand unless the rest of it is really good.
Hope you enjoy the deck.