Big Praxis for the Winter Welcome

If you guys are tired of seeing Fire/x aggro after Fire/x aggro, here's a different take on the pauper event. I went 7-2 with a similar list, losing to TFP tokens and Skycrag aggro, which led me to cut the 3 mana 2/2 warp praxis guy and add in Torrential Downpour, which is live against just about everything. Not a lot can kill your guys when common removal is deal 3 and there aren't any actual kill spells outside of cut ties. Cannonbearer is basically Heart of the Vault in this format. Magmatic Sentinel also happens to kill everything except for cards in the mirror.