This is the red deck I conceived from the Alpha booster box and precons.

The goal is to get to four Mana as fast as possible so you can use her fireballs ability.

Use the walls or scarabs to create a pocket, similar to a QB pocket in the NFL.

Use wildfire and nova to wreck havoc to opponents critters and put extra pressure on opp Avatar.

Your salamanders and river of Flame give you extra spell casters to lob fire spells at your opponent all day.

The imps provide ETB damage so they can take out critters in conjuction with fireballs and heat rays since majority of critters are 4 power or less.

Just imagine a row or column of spellcasters hurling fire spells and the other Avatar can't escape.

Since your salamanders are fire proof, they don't mind if the scene gets too hot.

The dragon, Legion, Phoenix, and demons provide backup plan and more muscle. The dragon is synergistic with incinerate.

Sideboard.

Boil and drought to deal with water decks.

Scarecrow to deal with flyers.

Shackles, spear, and infiltrate to deal with problematic critters.

The lethal critters to give extra help with aggro deck & add more pocket protection, if needed.

Avatar of Consuming Fire