Firestorm, Ashblast Build tuned up!
Weakness i think was bevor less/slow dmg vs Elites…now you can use your Weapon vs Elites.
Bevor the dmg was ok but extrem low.vs Elites/Bosses(no Elite DMG Mod!!!).
Its the same Build that iam using in my first Vid, but i was not 100% happy with it.
I change 2 mods, one for more crit dmg(benifits from resistance Piercing).
and Anomaly Enhancer on Symbiont smg(good stats for that Build).
Iam sure with this build and a tactical rifle will be way better(no god roll yet).
Tacitcal Rifle with…
Armor Piercing
Status
Skill Leech
and Anomaly Enhancer T2 Mod would be Crazy for this build(huge more dps!)
Skill tree here…
Complete overview in English (Gear)
https://outridersbuilder.com/#/build/pyromancer/SJw_9gPOdCw
Best regards 
Edit:
75% Armor Piercing and 97,5% Resistance Piercing included!!!
Edit2:
Cons: Ashblast +66% Range not included(i dont need it)
Edit3: My Weapon Power is not grazy godlike high…only 80k on SMG…just Equip a 90k + Weapon with the perfect Stats(Tactic Rifle or a Weapon of your choice).
Key mod is T2 Anomaly Enhancer and Dark Sacrifice.
You can reach Solo over 450k WP, with Group and Buff over 500k!
Edit4: This Build benifits from Armor and Resistance Piercing, as you can see i have Ultra High Piercing on Resistance and Armor…no DMG or Elite DMG Mod Required!
Edit5:
https://www.reddit.com/r/outriders/comments/n0av28/all_enemy_resistance_values_almost_a_chart/
source