EasyMode-O-Tron Level 20 Dwarf Wizard Wym's LavastaffTrembling StaffBlood LocketBlood LocketArmorbane PendantFarzil's Perplexing HornFirehide RobesSticky SlippersSolid RockSuperb Electromancy1 x Mighty Spark1 x Obliterating Spark2 x Flame Jet1 x Dissolve Armor1 x Wild Run1 x Memory Loss3 x Immovable1 x Toughness6 x Firestorm1 x Perplexing Ray2 x Combustible2 x Spark Generator2 x Short Perplexing Ray2 x Winds Of War1 x Parry2 x Squeamish2 x Vulnerable2 x Volcano2 x Path Of Knives1 x Resistant Hide Divine Droid Level 1 Dwarf Priest Whiteglow FlailNimbus BladeHoly BreastplateLight Blue ShieldSticky SlippersRavenna's IncenseDemon Charm Of The 2nd CircleDemon Charm Of The 2nd CircleAdvanced FerocityPious Healer1 x Wild Run2 x Demonic Power1 x Inspiring Presence1 x Blind Rage1 x Flimsy Block2 x Demonic Miasma1 x Dwarven Battle Cry1 x Cleansing Presence1 x Barge2 x Demonic Feedback1 x Healing Pulse1 x War Cry1 x Sapping Touch1 x Boosted Heal2 x Nimble Strike3 x Holy Armor1 x Weak Chop1 x Talented Healer1 x Icy Block1 x Strong Bash1 x Unholy Frenzy3 x Impenetrable Nimbus1 x Martyr Blessing2 x Immovable1 x Fiery Stab1 x Polearm Slash1 x Altruism M Bal Ants Level 20 Dwarf Priest Whiteglow FlailGodtouched SpearHoly BreastplateLight Blue ShieldSticky SlippersRavenna's IncenseDemon Charm Of The 2nd CircleDemon Charm Of The 2nd CircleAdvanced FerocityPious Healer1 x Wild Run2 x Inspiring Presence1 x Blind Rage1 x Potent Stab1 x Flimsy Block2 x Demonic Miasma1 x Dwarven Battle Cry1 x Cleansing Presence1 x War Cry2 x Demonic Feedback1 x Healing Pulse1 x Barge1 x Sapping Touch1 x Boosted Heal2 x Nimble Strike1 x Icy Block1 x Puncturing Stab2 x Team Heal3 x Holy Armor1 x Martyr Blessing1 x Weak Chop1 x Talented Healer2 x Immovable1 x Impenetrable Nimbus1 x Penetrating Lunge1 x Altruism2 x Demonic Power I will note that you may be forced to run Glinting eye hammers if you can't counter warriors (which is everyone).
Theme of the build is to cause yourself to draw tons of cards, and turn the negatives of using self-damage into a positive. Rotate in more boosted heals, or 1 damage attacks where you can, and rotate cards onto your wizard as needed for more or less firestorming/map control/anti-war tactics. Enjoy. Be aware the build I posted above isn't static, but changes every game for tweaking it. There's no magical formula, but most people aren't expecting this build right now.
For the self-heal, cantrip, and extra healing overall. You also get an aoe heal you need for FS builds, and an altruism to proc more cards.
Can you keep your enemies away with only 1 wiz? I firstly ran a 1 wiz 2 priest team for my FS build, but then I switched for 2 wiz and 1 priest to be able to have 2 Staff of Winter, and because I also realized that one priest could handle the healing by himself. What I don't understand is the Advanced Ferocity. In the current meta everyone is running dwarves, so you are basically giving them extra cards. If you can't spend a major token in the racial, why not 2 more Raging Rocks? And if you don't have them, Untrained Stoutness is also a very good option, as you would have 3 more traits and thereby you would gain in consistency. Plus, 2 of those 3 traits are Inmovable, which are very useful, and trip is not so bad. Another possibility is Advanced Toughness.
Those are good points all-around, and I'll say that this build with 1 wiz can work, but requires constant tweaking depending on the teams you end up playing. Advanced ferocity is fine in this build UNLESS you find yourself against dwarven NS warriors (which almost certainly will beat you anyway no matter what when you run FS). The theory is that more cards benefit you more than more cards benefit your opponent, because your deck is designed optimally (in theory) to chain card draws while you spam fs/self heal everyone. Those are good choices, as is solid rock, the only differences being token cost and necessity.
I will say that this isn't the optimal firestorm build I can make, and I would consider it outdated at this point. I can update it though, and I will.