EDIT (2/25/18): -3
Cat Burglar -1
Steady Marshal +4
Stonescar Sneak. After discussions on Reddit about this, I tried out this little 1/1 dude that I ignored before and my friends over there were spot on. This guy is legit. I had originally ignored him because A) I generally hate cards not named Oni Ronin that die to Vara's Favor and B) he's a 1/1 for 1. However, his text adds EVEN MORE reach to a deck that was swimming in reach before. He is a board stall slayer, something any aggro deck loves (though the more I play this deck the more it feels like a really fast midrange deck). As an added bonus, his ability used on Whirling Duo is asininely good vs. agro mirrors. As such, I got rid of the already mediocre Burglars and one of the Steady Marshals (arguably the most powerful 1 drop in the game and also by far the clunkiest and most awkward with this deck's mana base). I didn't have as much time to play the game yesterday but I got in 10 games and went 9-1 with these changes. I love a deck that keeps on winning.
My take on the gunslinger deck post nerfs. In my opinion, this deck is stronger than the stonescar variety. You will stumble on faction/power every once in awhile but mostly the high number of duals allow you to hit your creatures on curve most games. I'm 30-7 since tweaking and landing on this version. I started at 1200 Masters (so high and should be taken with a grain of salt) and am down below 600 now. I'll jot some notes for y'all below but I LOVE feedback so if anyone has suggestions please chime in!
Why Justice?
Steady Marshal is not really a reason. It is a slight buff to the typical 2/1s of fire agro but only slight (and some games not even). However,
Whirling Duo and
Slay are your real MVPs here. They give this deck so much more reach vs. all the sudden giant sentinels that are popping up (slay) and lifegain vs. agro mirrors. The 9th-12th charge unit are also very helpful.
Cat Burglar is a tech choice that has been relatively underwhelming and could probably be something else though I don't know what. Ashara maybe?
Anyway, enjoy!