Behavior that reduces % damage in an arc

[Phubar]

Hi, im back after some years

I want to make this happen: if a unit takes damage from the front of its model reduce damage by a %, if another unit takes damage fron its sides it reduces damage by a %, if an unit takes damage from rear it takes increased % damage.
If the reduction would be at 360° it will not be a big issue. The problem is that: im noob with data + the behavior would only work in some directions.

Tnk all!