Very fast and strategic:
Keep in mind, goblins are VERY weak on their own.
This deck is sort of an all or nothing, HOWEVER, it has its curve. For example:
I built this deck around getting out a Goblin Chieftan and a Krenko, Mob Boss, not only does it give all goblins +1/+1 but it also grants them haste. Krenko's ability being "you may tap him to add a 1/1 goblin token onto the battlefield for each goblin in play." Which giving them all haste and making them a 2/2 goblin is nasty, especially with seige-gang commander to either pierce the ones being blocked at the enemies life, or to take down larger enemies.
Another strategy is the good ol' Goblin Arsonist and Goblin Grenade combo, my friends call me an ass for this! While using this deck, no matter whom you're versing, its dire to gain control ASAP, because if you dont, and they have a big creature, those are nasty towards goblins and it may be hard to recover. So right off the bat, say you have Warren Instigator on the battlefield, Goblin Arsonist and maybe a Goblin Grenade on the field. Now, depending whats in your hand, you could have the chance to get 2 creatures on the battle field with Warren Instigator. So if your opponent has a 1/1, why not cast goblin grenade, and deal 5 damage directly and when Goblin Arsonist leaves the battlefield (assuming thats the card you chose to sacrifice) deal his 1 damage to the creatures, OR if by turn 3 youre oppenent has a card with toughness over 1 then you could easily deal the 1 damage direct and 5 damage to the creatures, and then you can quickly get 2 creatures out, often times, i can get a warchief out, and krenko mob boss, then due to the reduction of 1 mana, summon a chieftan with my remaining mana, and then tap krenko for at least 4 more tokens.
Now, if you have an army of tokens, as you should with any good hang, chieftans, kings, and wardrivers can bump them up, so a 1/1 token can really be dealing 5 damage each by turn 6! Or, you can even pierce there whole health by turn 5 (on a good hand) with massive raid!
Another strategy i like to use, is say my opponent has a 4/4 and im attacking with a 1/1 token, well, if i have one untapped land, it doesnt take rocket science to know what i could do next! Say they block, most people would, assuming, why not? No hard is done, however there creature remains tapped! Thats where there wrong, i can quickly lighting bolt to deal a total of 4 damage and both the creatures are dead, i destroyed a creature quickly, strategically and in my opinion, prideful!
This deck is extremely fast paced, and strategical, i've beaten people numerous times on turn 3 or 4! you'd be suprised, you should most likely always have a 1 or 2 mana drop to quickly start pecking damage, however, this makes for a risky free for all deck! Somewhat inexpensively and easy to get cards can make a very good deck!
I recommend this to anyone who likes to be quick and devious!
Good Luck, and Cheers!