Vile Eruption, range added and damage of spikes

Occultist, DEE > Vile Eruption

the 1.5m radius, is added to main damage, the explosion

what is the damage of spike? cause the damage listed on Vile Eruption, is added to main damage. or am i wrong?

im bad testing, but seems is 10% of main damage

btw, my english is bad, also noob in GD hah, calling it “main damage”

can bump in this forum?

asked in other 2 places

no idea if im missing more info. tried to attach an image, but the forum askes me for more posts to be able to share links. or maybe is the wrong subforum, no idea