Herald of Ash

I run a block/eva/dodge build, with a claw and a shield, with double strike as my main source of single target dps and reave as an aoe. I run both Hatred and Herald of Ash on reduced mana and I must say it's a lot of fun and the dps is considerable
(double strike does 6707 dps unbuffed, 7690 dps with herald, 9000 with hatred, and 9983 with both. with my 8 frenzy charge and both buffs it does 11 999 dps)

the spell is listed as an aoe, so aoe nodes should affect the burst of fire that happens when you kill an enemy.
levelling the gem does not increase the % of fire damage, it stays at a flat 15%, but it does increase the ignite damage on kill.

Is the overkill ignite component based on the fire dmg only? or your total dmg?

Ie, monster is on 10hp
hit with 1000 phys attack
herald adds another 150

overkill dmg = 140? or 990?

Does it work with EK?

it won't chain reaction, i'm guessing, correct? because in that situation, it might as well be vaal DD

I am also curious about it working with EK, or rather spells in general. It says just attacks, so unfortunately it's unlikely...

has anyone tested if increased effect of auras works on herald of ash ?

the skill does not have the "aura" tag.....

It does work with EK, as in: 15% phys damage added as fire. But it does not trigger the second effect, because EK is not an attack!
BTW.: I use it in my EK build and sometimes it causes graphical bugs. There appears some sort of red flash/line for just a split second. One of the many graphical bugs coming with the expansion ;)