Token Butcher, Mardu Midrange

This is the deck I have wanted to make ever since the butcher was spoiled, so I've given this quite a bit of thought as to what would work and what wouldn't. The first thing I would suggest is taking out Athreos and one Iroas. Athreos just isn't what this deck wants to be playing on turn three. This deck wants to win as fast as it possibly can, pushing through tons of damage very early. Athreos is just slow, and even, though it's very good maybe in the late game or if somehow the board has stalled, then I would rather be playing Iroas over him. Iroas is good, no doubt, and he is there for the late game, but there is no reason to have two. It greatly increases your chances of having him as a dead draw early on, or even late if your board state isn't too good. as a replacement option, i would suggest two copies of the Mardu khan, Zurgo. he fits like a dream on your curve at 5 mana, and if you have a Rabblemaster or Brimaz turn three and butcher turn four like you would hope for, then this guy ends the game turn six. If they survive, you're easily going to beat them in a few turns if they don't deal with it.

Other than that, the deck looks extremely solid, however, and this is just a matter of preference, i would main the charms over the strikes. I feel they have a lot more utility, and an feed the butcher if you need them too, and you already have a lot of burn to the face if needed through the stoke.