Early game is based on very cost effective one drops, Vexing Devil is a good cost effective card, forcing your opponent to take damage to prevent a 4/3 attacking them next turn. Often people take the damage I find during my games, unless they have a destroy in hand or can't afford to take the damage.
Spike Jester is a great 2 drop with haste and is great to pull out early mid or late game since if there is 1 or more Mad Aunties on the field he becomes a heavy hitter that can be regenerated if he's killed in combat or with a low cost damage/destroy spell, which he is prone to with his low toughness.
Goblin Piledriver, this really works well with the other goblins in the deck with it's +2/0 ability allowing it to take out
Goblin Chainwhirler is
Goblin Chieftain good for it's passive +1/+1 to other goblins but amazing for it's passive haste it grants other goblins. Allows Lightning Crafter to tap first turn if he's on the field, as well as Mad Auntie to tap to regenerate another goblin first turn.
Mogis, God of Slaughter for more pressure late game when playing multiplayer, as it forces all opponents at the start of their upkeep to discard a creature, or take 2 damage. Which is great for pressuring low hp opponents to start clearing their field of creatures or high hp opponents to take the damage in order to keep their creatures on field. Can be searched for and grabbed with Infernal Tutor's Hellbent ability or Tamiyo's Journal's 3 clue ability.
In order to keep you hand full cards such as Browbeat, Infernal Tutor, Phyrexian Arena allow you to increase your draw capacity in a few different ways.
Browbeat is great for it's utility of forcing a player to take damage to block your 3 card draw. Might backfire, as opponents with lifegain decks may take the damage to deny your card advantage.
Infernal Tutor is great for grabbing another duplicate of a card in hand from your deck, with the benefit of it's hellbent condition allowing you to search for any card in your deck if you have no cards in hand after casting it, which is great for pulling something like one of the artifacts in the deck or Legendary creatures.
There is also Phyrexian Arena, the 2 life per turn adds up, so choosing when to play this matters
There are various sorceries and instants for creature damage and destruction, with Dreadbore, Terminate and Cut / Ribbons.
Dreadbore is there for Planeswalker removal first, if the deck you're playing doesn't have planeswalkers, sub this out for Mizziums Mortars for more creature damage potential and a potential boardwipe lategame with it's Overload ability, or Surgical Extraction for decks that have multiple combo cards that need dealt with, which is especially useful after a wipe from Nevinyrral's Disk. If you're playing against enchantment decks this is useful for shutting down multiple passive enchantments that you've sent to the graveyard. Also very useful against decks that rely on dredge since it can be used to instantly exile a combo piece and all copies of it, and having the option of being able to be cast for 2 life you can cast it even if you're tapped out. Occasionally you'll need to sub in Rain of Gore if you're playing against a life gain deck in order to even the playing field, and help put pressure on them lategame if they have a lot of passive healing.
Terminate is a standard destroy creature instant for particularly high toughness creatures an opponent might have, but can be subbed out for Dash Hopes if you need to counter a particular non-creature combo piece or an indestructable creature like any of the Enchantment creature God subtype cards. Conversely you can take Searing Blood for 1v1s against decks with mostly low toughness creatures for some added player damage with creature destruction, keeping Dreadbore for planeswalkers or any big hitter on your opponents field.
Cut / Ribbons is in there for creature damage and for it's second aftermath sorcery. Cut does 4 damage to a creature for 2 mana, which is nice, like card:Mizzium's Mortars normal cast does. However the Ribbons sorcery is fantastic for a win condition as it's each opponent loses X life and is cast from the graveyard so even if it's milled or the first half Cut is countered you can still cast Ribbons from the graveyard.
Oh, and then there's Lightning Bolt of course.
Any suggestions gladly welcomed, especially for any good sideboard cards I could use.