I'm playing this list in Casual, and having a lot of fun with it. So far, my biggest Sunscale Raptor has been 13 attack. The challenge comes in trying to keep cycling the raptors... it's not easy, but the buffed Leatherworking Kit makes it a bit easier.
There's just one raptor in the deck, to make its early scaling a lot faster. You can make a copy of 3rd or 4th generation raptor with Selective Breeder.
Mulligan for the weapon, the raptor, and Scavenger's Ingenuity. You should pretty easily draw into an Augmerchant, Wound Prey, or Devouring Swarm to activate your first frenzy. If you have weapon in your opening hand, it's okay to keep Kolkar Pack Runner and a couple spells.
One of the best cards to bounce back to hand with Swarm is Warsong Wrangler. You can make a very threatening board with back-to-back Wranglers.