Braid of Fire is a good cheap mana producer often used in red EDH.

Slate of Ancestry is cheap and goes gangbusters in a token deck like this. Mind's Eye could work too. Card draw is hard to come by in mono-red, but you still gotta find ways!

Thousand-Year Elixir is cool. Magewright's Stone also. In the Web of War allows you to tap Krenko the turn he comes into play, and the tokens he produces are 3/1 with haste! Ogre Battledriver is the same effect on a critter.

Goblin Lackey and Warren Instigator are awesome. Beetleback Chief is Siege-Gang junior.

Furnace of Rath ups the ante like nothing else. Imagine it with Coat of Arms, In the Web of War, Skirk Fire Marshal or Purphoros. Game ender. Gratuitous Violence is a safer version of this.

Ashnod's Altar Gives you tons of mana, and goes infinite with Umbral Mantle if that's your gig. Good with Carnage Altar too.

Blasphemous Act can reset the board if you need. Cheap with all your tokens.

You've got quite a few effects that boost all your creatures' toughness, and some effects that give haste (I've also suggested a few hastey abilities). This being the case, Avatar of Fury could be good. It's basically the coolest card that ever lived. The must attack clause works well with the speed of this deck. Urabrask the Hidden is another amazing red creature that helps get the most damage out of your goblins as possible.

With 18 Artifacts you could go with a Goblin Welder. This will allow you to salvage your best artifacts.

Edit: by Avatar of Fury I meant Avatar of Slaughter.

I apologize for the lack of speed in replying, I've been busy with work.

So, Braid of Fire only gives you mana during your upkeep, which drains afterwards, but is something I shall add if I feel I can reap the most benefit from it, and if I can get my hands on a copy. I tried Slate of Ancestry at one point, but the massive draw is something I see as a bit of a turn-off. I love the way Mind's Eye works though. It's like a reverse Rhystic Tutor. Thousand-Year Elixir and Magewright's Stone are both nice, but the fact that they can only be used once is rather offputting for me. In the Web of War and Ogre Battledriver were both cards I had in my initial version of this deck, and I have been thinking of putting them back in.

About Goblin Lackey and Warren Instigator: I'm working on phasing out cards that only work during the combat phase, because they become the first things to die, and I prefer to be able to reap the benefit from a card multiple times. Which is why I'm removing Legion Loyalist. I love him, but I don't think he'd fit in this deck. I'm also not too sure about Beetleback Chief. I've been on and off that one for a while now.

Furnace of Rath and Gratuitous Violence.Doubling damage is always a fun thing, and enchantments are my second favorite card type, right behind creature (of course). Probably going to go into the slot Eldrazi Monument was, since doubled damage>indestructible tokens. Board wipes aren't that big of a thing in my meta, and Krenko allows me to recover rather quickly from them.

I could have sworn that I'd included Ashnod's Altar. I'll put it back in. The same goes for Goblin Welder.

Blasphemous Act is one of those cards I'm currently trying to get a hold of for inclusion, and I haven't slotted it in because I don't have it at the moment. And because I need to figure out what to remove.

About Avatar of Slaughter-will get considered, just not sure what to remove to add it.

I do like the idea of Urabrask the Hidden. My meta is slightly token-heavy, and this just makes those kind of games more fun. Especially if I decide to play this deck against my Rhys the Redeemed deck. The shenanigans shall be much fun.

just wondering but what do you think of Magus of the Moon. Creature form of Blood Moon

I'd run it if I could fit it in, but I'm light on slots due to the heavy investment into combo. If I were to slot it in, I'd cut Beetleback Chief or Mogg War Marshal

When you play the game what round does your deck go off on?

It really depends on the hand I get. The deck either goes off around turn 5-6, or it sits there and does nothing. I've retired it for that reason.