First of all, thanks for all your input. Now what to do with it:

1: I'm going with zilla on this and switch 1 Incinerator for 1 Fanatic.
2: Proxies aren't allowed in any of the tournaments I've played, but if they were, I'd surely do that.
3: going with zilla again, the double red in Warchief's cost is a bit prohibitive, I went a little over the top because you only need 2 Warchiefs to combo out. so I'm sticking with 3. And a third Piledriver is now on its way here as we speak, I'm continuing my search for the fourth one.
4: I'm currently playing 3 of them and that may go to 2 to add some more stuff, I'm not going to run less than 2 because of the damage combo.
5: I moved them out altogether for an extra Matron and the third Warchief.
6: any "must counter" card is good IMO, there's some landstill in my meta, and even some fish. As well as some Keeper. So I'll probably leave it at three.
7: what would be better, in my meta both types are about equally represented (unless the germans are playing, in which case Slaver is used far more) would it be a good plan to take out one Crypt and go to 3 Rods and 2 Mutations?
8: testing the deck showed that the Marshal showed up in time to clear the board a couple of times. And in addition to that it showed that I could sometimes just play it off a warchief. Though what bothers me is that it doesn't really necessarily mean that this is the best choice for its slot. I'll keep testing, in addition to this, I'd eally like to include Mogg Maniac to the build as a possible Incinerator target for instant X spell damage to the dome and to combo with the Marshal for another instant kill. Any thoughts on this?

And so far I haven't heard anyone on the 7 Fetch-7 Fetchables plan, any thoughts on this??

Don't get me wrong, I'd play them if I had them, but even though I'd gladly pay for the playset, I can't find them anywhere.

Hey!, This is my current FCG build:

// Mana
1 Strip Mine
4 Wasteland
3 ESG
1 Sol Ring
1 Mana Crypt
1 Lotus Petal
4 Taiga
4 Wooded Foothills
3 Mountain
3 Bloodstained Mire
// Combo Card
4 Food Chain
// Creatures
1 Goblin Sharpshooter
2 Siege-Gang Commander
1 Goblin Matron
3 Gempalm Incinerator
4 Goblin Ringleader
2 Goblin Warchief
4 Goblin Recruiter
2 Goblin Piledriver
4 Skirk Prospector
4 Goblin Lackey
2 Naturalize
1 Skirk Fire Marshal
1 Goblin Tinkerer

// Sideboard
SB: 4 Pyroblast
SB: 4 Null Rod
SB: 3 Blood Moon
SB: 4 Tormod's Crypt

I tested the basic list from the primer but found that I had too many hands with Food Chain but no green mana available. So I upped the amount of fetchlands by 3, making the amount of fetchable land as big as the amount of fetches.

Second, I don't have any more than 2 Piledrivers. No big deal, they're powerful, but 2 works just fine. I've put 2 utility goblins in thir place, the fire marshal (another win condition and wrath) and Goblin Tinkerer, he kills artifacts. Still reeling from a loss to Sui because of a Chant on a stick, I decided to add 2 instant answers to the deck in the form of 2 Naturalizes.

As for the SB: it's simple, Blood Monn is just a house, Crypt is good against way too much decks, 4 blasts are always useful against counters and togs alike and finally Null Rods are too good to pass up with so many artifacts being played.

Does anyone have any suggestions for my deck?