I like to see goblin decks with Boggart Ram-Gang. +1!

Hordeling Outburst I see in your maybeboard, but it is really really good. Door of Destinies seems good but it is really slow. Krenko is also too slow. Goblin Rabblemaster and Goblin Guide seem great here, although you might want to hold off on buying the Rabblemaster until after rotation.

I know that, but I am trying to keep it budget.

I agree, for all goblin decks, rabblemaster is a must. I expect he'll be around the same price as Krenko a month after the rotation. Goblin Guide is good, but yeah 21 bucks is a ton of dough for one card. Hordeling Outburst is a cheap spell too. It is essentially a Captain's Call one mana cheaper and fits with Krenko extremely well

Krenko, Mob Boss is also a win condition. If I have him out by turn 4 or 5 I will win most of the times

Goblin Bushwhacker and Goblin Wardriver are strong in Krenko decks

I would take Bushwhacker over the fire slingers and wardriver over mogg fanatic/goblin arsonist. I think they are more useful in this deck than what you currently have

You should consider putting 4x [Warren Instigator] instead of the 4x [Mogg Fanatic] and I would drop [Door of Destinies] and add in some [Rite of Flame] to make the deck a bit faster

errrr forgot to double the brackets.... Warren Instigator Mogg Fanatic Door of Destinies Rite of Flame

exept that Rite of Flame is banned in modern.

You're correct in going for Goblin Chieftain over Goblin Rabblemaster. Rabble master is very poor in modern.

the best card for goblin deck. Shared Animosity

Having some combination of Blackcleave Cliffs, Blood Crypt, and/or Sulfurous Springs so that you can make black mana more consistently is a good idea. I'd run 19 lands with 7 Mountains and 12 in any combination of the ones above and Auntie's Hovel. With that setup you are unlikely to get mana screwed and will almost always be able to make black mana. With this new mana base, I'd want to utilize our access to black mana in a better way. Jund Hackblade is a viable card with Spike Jester and Boggart Ram-Gang around in the deck. Tattermunge Maniac is another great way to unleash the full potential of Jund Hackblade while still being a powerful creature. Door of Destinies, and Krenko, Mob Boss are usually too slow in this format. Replacing them with Tattermunge Maniac, Jund Hackblade, or Burning-Tree Emissary (there is nothing quite like chaining a few Emissaries and then finishing off with a Jund Hackblade(especially if you control a Foundry Street Denizen)). Lastly, Krenko's Command can just be straight up replaced by Mogg War Marshal.

you need a 60th card. how about a third Warren Instigator?

Thanks

My opinion, in a mono red deck Shattering Spree is a must in the side.

Outside of some Simian Spirit Guides for slightly faster acceleration on early turns, I can't think of much to add. +1

I think that Goblin Grenade is a good addition to any Goblin deck. It can be a backup plan when damage isn't getting through for a very small cost or a removal.

That is why I have 4 of it

Goblin Arsonist to combo with Goblin Grenade.

why not the enchantment goblin bombardment? just fling all your goblins at your opponent for a 2 drop

Too bad it is not legal in Modern

while Legion Loyalist is great, multiples of him can make a bad hand, i Would Suggest dropping 1 or 2 out and adding...who knows maybe Vexing Shusher mainboard? or Stoke the Flames since it is great Direct Damage or removal. Some Tribal Stuff Might be useful too. i Almost forgot Goblin Rabblemaster is a MUST here, maybe getting out 2 Goblin Piledriver to the Sideboard and the Rabblemaster in... go test it ou. +1 for Goblins

Sideboard wise i would say add green to your mana base so you can put in Atarka's Command Destructive Revelry. I've been toying with the correct number of Goblin Piledrivers to Goblin Rabblemasters and my current ratio is 4-2. im starting to lean to 3-3 but we'll see where more playtesting leads. good deck though! +1. and great inclusion of boil!

also if you want to check out my Goblin Co. deck please do!