have you played it in any fnms

@Kneppster at the store I play at, Starcity Game nights are the more competitive nights, it mostly does middle of the pack for rankings, because the best decks are control or abzan ascendancy combo. This deck also does poorly against large creatures (like Siege Rhino )

Sorry, Jeskai Ascendancy...

I run a RDW deck a lot like this, Boss Sligh. It tends to wreck my friends, most of whom run tourney-level Abzan or Sultai lists. Things that work really well for me are:

-19x Mountains. 21 will slow this down, and there's no reason to run 4-drops in RDW (except Stoke the Flames)

-Titan's Strength instead of Magma Jet: It's cheaper and can amount to more damage.

-Akroan Crusader helps you make a token army quickly, which makes early blockers less effective. Great synergy with Foundry Street Denizen, since the Crusader tokens trigger Denizen.

-Dragon Mantle and Hammerhand go with Crusader. While both proc heroic, Dragon Mantle is cool because of the card draw and potential extra damage. Hammerhand is also useful: Goblin Rabblemaster can survive Drown in Sorrow, something can't block, and haste.

-Blinding Flare: a little goes a long way, so I only mainboard one, but you can shut out blockers and use it to trigger heroic. It's mostly easier to just go around enemy creatures than get bogged down trying to remove them.

-Hall of Triumph is a good side option if you know you're against Drown in Sorrow.

-Also, Harness by Force is strictly better than Act of Treason in mono-red, since the extra mana symbol doesn't matter. They might look similar, but the times when the game goes long and you can strive it really tip things in your favor.

Anyway, just some things to think about. +1 for Squirrel.