Purphoros, God of the Forge, Impact Tremors, Warstorm Surge, Skirk Prospector, Mana Echoes, Ruby Medallion, etc. I hope this is helpful.

Quest for the Goblin Lord works powerfully with goblins. Sword of the Paruns is ridiculous at token generation and is a worthy anthem effect, and also goes infinite with Skirk Prospector. Umbral Mantle can let you explode as well. Ring of Valkas will give Krenko haste, which he will need because Krenko gets hated out and killed very often. Swiftfoot Boots, and if you can afford them Lightning Greaves, are even better. Marton Stromgald gives you immense attacking power, as do Coat of Arms and Shared Animosity if you could afford those. Goblin Chirurgeon saves you from boardwipes and Krenko from hate.

Now let's move onto burn. I would like to mention one thing. Commander games have life totals of 40. Burn can sorta easily kill people with 20, but in multiplayer games with twice that life total it just isn't viable; except for goblins. Last-Ditch Effort, Gempalm Incinerator, Hellrider, Voracious Dragon, and Goblin War Strike are some burn-ish cards that can get a kill in, or at least do enough damage to rationalize using burn against an opponent with 40 life.

Lanzo493, these are amazing suggestions, thank you! As for your comment on the burn, those spells you linked are great, but the burn spells I put in before were mostly for enemy creatures that could screw me over. Dragonrage synergizes well with the burns like Banefire, and so does Skirk Prospector I'm liking the infinite goblin combo you suggested too.

Hall of Triumph can be good in Tribal decks. Caged Sun is absolutely worth the extra couple of dollars. It doubles all mana from your basic lands on top of giving all of your Goblins +1/+1. With Caged Sun out and the low CMC of the average Krenko, Mob Boss deck, you will have trouble keeping cards in hand.

Goblin Assassin is absolutely broken. It is the only card that I truly HATE in an opponents Krenko deck. It is rare that anyone runs protection from sacrifice so you can keep opponents fields wiped and have your Goblin army go unblocked.

Burn is a bad strategy in EDH. Burn cards also don't tend to see play because most decks run big creatures or creatures that get boosted. Your average Lightning Bolt doesn't manage to kill much.

iAzire, I misread Goblin Assassin. WHUPS. That's really good, like got damn. I'll consider everything, and I probably will be removing a lot of lower burn spells. Thank you.

Yes, you will have to flip coins too so that's the only downside. Of course luck plays a big part in this but you can just sacrifice one of the tokens that just came into play.

Haste is absolutely huge in Krenko. I will list a good number of choices for Krenko, it is always good to have redundancy in EDH because you may not draw what you need so having multiple cards that do the same thing is beneficial. You can pick and choose what you want to fit your budget requirements.

Anger, Emblem of the Warmind, Fervor, Goblin Chieftain, Goblin Warchief, Hammer of Purphoros, Hellraiser Goblin.

As I said, I find all to be good, most fit the tribal theme. Purphoros, God of the Forge and Impact Tremors do a lot of damage. They should both be included regardless of fitting theme, thus Hammer of Purphoros will fit with the God himself.

iAzire I actually already have Goblin Warchief, Purphoros, God of the Forge, and Impact Tremors in there. I had Hellraiser Goblin, but it's a bit risky to run when all your creatures attack every turn. I'll probably fit Goblin Chieftain, Fervor, and Anger in there somehow.

Ah you updated, my bad lol. I think I was typing when you updated.

I see what you're saying. Hellraiser Goblin can make it to where you don't have blockers.

When using Anger the hard part is getting it to the graveyard. As long as you could do that it's good.

Everything else should be fine.

I'd suggest Goblin Rabblemaster for more goblins. And In the Web of War for haste beat down.

jaggerwolfgang with Goblin Rabblemaster, I run into the same problem as I would with Hellraiser Goblin; my goblins attack every turn. In the Web of War might work though, even if it is a little expensive.