Damage over time

I’m making a build around fire aura and ignite. But i wonder does added fire damage also ad extra damage to damage over time effects like fire aura?

It does… you just need to check the skill’s tooltip and see their tags.
If you hover Fire Aura, it’ll show you this:

Scaling tags
Fire | Spell | Damage Over Time | Area | Intelligence

Meaning everything with these modifiers will affect Fire Aura.

ok thx

While flat spell damage affects Fire Aura because it has the Spell tag, it won’t affect ignite.