Fireball and area of effect passives

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wizard_6 wrote:

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TheRabbit303 wrote:

The splash damage on fireball is the damage listed. So any increases to area damage will increase the damage on fireball. (This is why so many people throw concentrated effect on it)

I've tried adding concentrated effect on to fireball but didnt notice any damage change on my skill tab, nor when shooting fireballs, even tho supposedly skill is affected by it.

This is due to a limitation of the stats system in displaying this.
Because the fireball isn't always area damage (if it pierces something, there's no area of effect, it just hits that one thing), it can't have the area damage stat built in. Instead that stat is added when it explodes, thus making the area damage increases apply.
But because when looking at the skill you're seeing the damage calculated on the base fireball stats, it's not yet flagged as area damage so you won't see it apply.