So we all know that Goblin Rabblemaster is amazeballs. He makes tokens and doesn't afraid of anything. These tokens interact with another goblin, the illustrious Foundry Street Denizen, pumping him up to a 2/1 every combat, and obviously you're going to swing with him every chance you get.
On Tarkir however, a certain Mardu Scout has the dash ability, pumping the fabulous 1-drop every turn and charging in for 3 damage himself, and better yet, he's on curve and adds 2 devotion to Nykthos. Don't have the scout To follow T1 Denizen? Frenzied Goblin fills in nicely to get some damage through, and even helps finish games if they drag on too long.
Thats one creature who cares about red creatures entering the battlefield, one creature who repeatedly enters the battlefield, and one creature who creates more creatures that enter the battlefield. Which means we should use another card that cares about creatures entering the battlefield.
Impact Tremors. I could also use Purphoros since he fits the role quite nicely, but I can't have 4 of him out on the field at the same time. Plus, I just spent all that money on rabblemasters. I'm not made of money yo.
At some point in the game, the denizen or swinging rabblemaster will become 4 power or more. Which means combat tricks yayayay! Temur Battle Rage I feel is an overlooked card, (as well as Wild Slash, a 1 mana creature-only shock. Not terrible). Rage will ensure your ungodly massive Rabblemaster can get some damage through, or at the very least trade with a blocker. Even if you can't quite muster 4 power, any doublestriker Is better than none.
Oh, and these goblin tokens are mostly expendable after they enter. So convoke a Stoke and sac it as Collateral Damage.
I'm more of a big picture kinda guy, so please tell me how I can improve this deck.