This FCG List just won me a 16-person tournament last week, my first, and I would appreciate any help in tweaking it for an upcoming power tournament. Obtaining cards is not a problem in this case.
4 Mountain
2 Taiga
2 Badlands
3 Wooded Foothills
4 Bloostained Mire
2 Wasteland
1 Strip Mine
1 Mox Emerald
1 Mox Ruby
1 Mana Crypt
1 Black Lotus
1 Lotus Petal
4 Food Chain
4 Goblin Recruiter
4 Goblin Piledriver
4 Goblin Ringleader
4 Goblin Warchief
4 Goblin Lackey
1 Goblin Sharpshooter
2 Seige-Gang Commander
3 Gempalm Incinerator
2 Goblin Matron
1 Skirk Prospector
2 Goblin Welder (he's a goblin and keeps artifacts under control)
1 Meltdown (looks good, never got to use it though)
1 Fling (looks good, never got to use it though)
SB:
3 Planar Void
2 Red Elemental Blast
2 Pyroblast
2 Pyrokenisis
2 Artifact Mutation
4 Null Rod
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Tournament Report Section:
Round 1 vs Stax:
Game 1: he had a God hand and after a few turns under a Tangle Wire and 2 Spheres I scooped.
Game 2: Welder tricks on Tangle Wire and Smokestacks; I beat for the win (no boarding)
Game 3: Same as game 2
1-0 (2-1)
Round 2 vs Control Slaver:
Game 1: I had early beats, he got out a platinum angel and I welded her out for his black lotus when my army got large enough.
Game 2: Early beats, he got out a platinum angel and I artifact mutationed her and swung for the win.
2-0 (4-1)
Round 3 vs Tog (4 color):
Game 1: Early on he mind twisted me for 5 and I top-decked Goblin Lackey, which resolved. He got locked under his own back to basics and never came back.
Game 2: First turn planar void

. I ReB his first tog and run around his next one with the pro blue piledriver.
3-0 (6-1)
Me and a friend were tied for first and decided to ID and split the prize (store credit)
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It wasn't a big tournament so I'm not reading anything into my victory. Looking back on it, I'm probably quite fortunate to have drawn the matches I did, rather than get any Oath or TPS (or Glimpse Kobolds), all of which were in attendance.
Also, I never got a chance to go off. My Food Chains were always forced or drained. Which is actually kind of ok, because it allows me to play lackeys and piledrivers. I beat everyone in Aggro mode.
I have tweaked my deck since as follows:
-1 Mountain
-1 Bloodstained Mire
-1 Fling
-1 Gempalm Incinerator
+1 Great Furnace
+1 Wasteland
+1 Goblin Welder
+1 Vampiric Tutor
My reasoning for the Goblin Welder: He justified himself in the Control Slaver match by being able to weld out a platinum angel, and also playing stax he wreaked havoc on smokestacks and tangle wires. He does compete with my Goblin Lackey for the one-drop, but here's what I do: If I know my opponent is playing blue, and it's game 1, I drop him off a Mountain to bait a force. Otherwise I always drop the Lackey.
Also, he's a Goblin (duh) and also according to some the best creature in the game. He pumps the piledriver. He baits counters.
I decided to splash Black initially for Planar Void and Chains of Mephistopheles. At the last minute I changed the 2x Chains in my board for 2x Pyrokenisis. I've never used Chains and the thought of Ancestral Recall targeting me and making me dump cards into my graveyard scares me a little. Open to any thoughts about whether Chains is good or not. After the tournament, someone asked me why I didn't run any tutors, so I added Vampiric (because it is an instant and doesn't compete with my casting threats on my turn, as Demonic Tutor would).
I threw in the Great Furnace to use for welder tricks, although I think hoping for Lotus and the furnace may be a bit much. Also, meltdown will kill the furnace so maybe not such a good idea.
Skirk Propector seems overkill as a four-of. I find I only need him there when I go off, and I can stack the one I need with the recruiter.
Gempalm incinerator seems sub-optimal. If I have the 6-7 goblins needed to kill anything big I'm already out-racing them. Besides I have Platz under control with my MD welders and artifact mutations from the board.
He is good against aggro, but I have a couple of Pyrokenisis in the board so I think dropping one is safe.
On Wasteland: I felt like wasteland was competing for the mana I needed to combo out and/or get more threats on the board. I just feel like I need mana on the board. I now realize that it's needed for dragon's Bazaars, but I am unsure of running 4.
So here are cards in maindeck contention:
1 Great Furnace
3 Goblin Welder
1 Meltdown
1 Vampiric Tutor
1 Gempalm Incinerator
Other cards I am thinking about in these slots:
Sylvan Library (draw engine possibility)
Sol Ring
Wheel of Fortune
Goblin Goon (just as a possibility; doesn't look great)
Burning Wish, which would take up board slots for (perhaps) Chainer's Edict, Pulverize, Decompose (my gut says yuck), and Meltdown.
Board changes:
My board was:
SB:
3 Planar Void
2 Red Elemental Blast
2 Pyroblast
2 Pyrokenisis
2 Artifact Mutation
4 Null Rod
and now it is:
3 Planar Void
2 Red Elemental Blast
2 Pyroblast
2 Pyrokenisis
2 Artifact Mutation
4 Ground Seal
I never sided in Null Rods once in the tournament, so I have swapped them out for dragon hate - Ground Seal. I am concerned that my board sucks for other combo, which I fear since I am not running FoW or Duress.
My goal in the board is to shore up my defenses for Dragon, Other Combo (TPS Deathlong), and especially Oath. Board Space is at a premium, which is why I am hesitant to add the burning wish option.
These cards are considerations right now:
Null Rod (never boarded it in)
Chalice (is this the combo hate I'm looking for? what to cut?)
8-Blast plan or not?
Tormod's Crypt (surprise value of 0)
Root Maze (doesn't look good to me though)
Chains of Mephistopheles (help, looks scary to me)
Pyrostatic Pillar (looks like it would hurt me more than them)
Mogg Salvage (meh... I have enough artifact hate methinks, but it's free most of the time)
Rack and Ruin (seems like a high casting cost for this deck's man curve.
Of course the burning wish option would impact the board as well.
Constructive Criticism is welcome....