Zardnaar
Legend
The thing about fireball, and spells in general, is that unlike martials, which generally have to be built to do a specific thing well, if a situation is not optimal for casting fireball, you can cast something else instead. With a reasonable selection of spells, you can tailor your use of your slots to fit the situation and opponents.
I'm seeing a lot of use from up-cast Chromatic Orb, particularly from Sorcerors. Ricocheting around is reasonably reliable in rage mode and allows decent damage to multiple targets without risking friendly fire, particularly if you don't have steel wind strike.
If a blaster I'm thinking ignore fireball or acid sorcerer and transmute.
We are using chromatic orb a lot for blasting.