One thing you're probably going to run into is that you have three black cards (10 total, but 3 variants). You run less swamps for it, bit it's also your only creature one-drop. You aren't going to have many opportunities to drop both on turn one unless you mulligan for it (hint: not a good plan). You'd probably be better to make it a mono red deck and use
lightning berserker (uncommon DoT. Ideally you'd use swiftspears, but they're pricey for an uncommon.)
Screamreach Brawler is a substitute for the black shaman (doesn't have the benefit of buffing, but it's a price to pay for monogamy. )
I'm not 100% sure what I'd trade out for foul-tongued, but it honestly doesn't work all that well in the deck anyway. Ideally, you will be dashing in cheap minions every turn, but you won't often have free mana to cast it afterwards.
wild slash would be my vote. Less chance of a big play, more versatility (you can use it on creatures, too.)