Firestorm feels very underwhelming.

Title.

Even fire remnant infused the damage is very lacking.
Currently only on a 4 link at the end of campaign but c'mon...
It not being able to even clear a simple pack of mobs feels borderline like a joke.
AoE of it is too far spread too and the impact area not big enough imo, so conc. effect is a must support gem.

For ppl wondering what I'm playing, it's a crit bloodmage caster, dmg on my other skills is there and fine.
Current fs supports are: echo, conc & overabundance 2.
Obv. tried other supports too but no matter what I tried these felt even worse.

Tl;dr: Fs lacks dmg + impact and need a buff imo.

I agree. It's super weak. It also doesn't work very well with cast on ignite. All the fire spells are lackluster except Living bomb and Ember Fusillade.