at this time I have 2 mods that add a 5% chance of x damage dealt to me on using ring of fire, one that deals 116 damage and another that deals 128. the damage I am dealt on being hit is 218.

my mitigations include
4 fire mitigation
84 direct fire mitigation
28 indirect fire mitigation

damage boosts for fire are as follows
+2% direct fire damage
+100% base fire damage
+96% indirect fire damage

now no matter which way I have tried to crunch the numbers I cannot seem to figure out how I am being dealt 218 damage.

on top of that I am always dealt max damage by this skill I am never dealt from only 1 of the two mods, is it suppose to always deal both mods damage whenever 1 of them triggers or are they a package deal always stacking meaning I have a 10% chance?

also how is that % chance applied? is it per target hit by my ring of fire? or is it based on when its cast each time at a flat 10% chance?

would love some clarification