I found the issue.
in Sid ability I read the below :
Modify stat Armor Penetration Percent Additive by 100% (additive)
as a comparison in stark ability I can read this :
Modify stat Armor Penetration by 50 (additive)
So i beleive that simply the armor penetration percent additive of 100% doesnt work (does it increase armor penetration by 1?)
Easiest way to Solve the issue, change Sid ability wording and mechanics to do the following :
Modify stat Armor Penetration by 1000 (additive).
This way it ensures that no amount of defense on even the tankiest toon could ever mitigate some damage on Sid basic
