Summary:

A low to the ground, all-in mono fire aggro list. Easy to understand, easy to pilot. Whether you win or lose, you will wrap up your games within 15 minutes, kick back, and relax while everyone else labors over exhausting rules interpretations and long matches.

Key Ideas:

Start tapping your Witch to curse your opponent's avatar for -2 life loss once you have 4 mana generating each turn. Nearly every spell in this list has <5 mana cost to facilitate this.
Cast your many charge minions and supporting magic to secure 2-4 additional damage each turn. With the loss of life coming from Witch's curse, many games will see your opponent to death's door by turn 6 or 7.
Go up to 5 mana only when you need a specific finisher that requires it (i.e. Courtesan, Betrayal) or specific combo (i.e. Charge + Greater Blood Demon) with guaranteed damage.
Use cards like Mix Ignis, Ruby Core, City of Traitors, and the Towers to make everything above happen earlier.
Ignore incoming threats and self-inflicted damage. You should be able to outpace it with Witch's curse.
Use one of many outs to deal a death blow (charge minion, blaze, searing truth, blaze of glory, firebolts, heat ray, hotwheel, colicky, betrayal, etc).

Combos:

Cast Charge on Mazuj Ifrit or Greater Blood Demon
Push Corruptor Freak onto enemy sites with Wuthering Heights
Cast Blaze or Blaze of Glory on any ally to crowd clear or deal massive damage
Jihad in your starting hand is incredible for obvious reasons.
Use War Horse or Sinterfee to move your guys around or past difficult sites (i.e.Troll Bridge, Thin Ice, Gnome Hollows)
Use Boudicca to maximize charge minions' damage to sites

Removal:

All cheap removal options in fire aggro should also pose an offensive threat. For that reason, we run Infiltrate, Betrayal, Blaze, and Angry Mob.

Set-up & Mulligans:

Play first if you can.
Mulligan so that your starting hand can produce at least 2 fire affinity and at least one minion. Send back duplicates to maximize combo potential.
Build a site bridge towards your opponent to increase attack paths.

Maybeboard / Substitutions

Damage accelerators/mobility: The Rack, Spin Attack, Leap Attack, Magellan Globe, Grim Guisarme.
Other good <5 mana cost minions: Lesser Blood Demon, Quarrelsome Kobolds, Clamor of Harpies, Siege Giant.
Ranged magic: +/- Firebolts, Heat Ray, Minor Explosion.

FAQs:

Q: No toolbox. What gives?

A: The delay that toolbox creates is sub optimal. We would rather draw and play something that can deal damage right away. Plus, we already have plenty of outs to draw when the opponent is on death's door so we don't really need it for that.

Q: Shouldn't I use the Witch's other curse ability too?

A: Only if you are 100% sure your opponent is mana screwed and delaying them an extra turn will allow you to deal substantial damage OR if they are on death's door and no longer can lose life from your curse ability.

Q: [insert card] is a very awesome 5, 6, or 7 mana card in the fire element. Why not include it too?

A: This list is all-in on low curve damage and is built on dealing damage as fast as possible. In order to be consistent we need to avoid drawing into a situation where we have to play a 5+ sites. Similarly, we need to avoid playing control cards like poison nova or disintegrate because they don't deal damage.

Q: When does this list lose?

A: The longer the game goes, the more likely you are cooked. If you find yourself casting minions defensively or as blockers, you are cooked. Your damage needs to come during turns 3-6.

Cat Ladies

@Flojax