Corruption For Armours Implicit - +base ES/Arm/EV

I had an idea to add another corruption modifier to armours. It would be neat if there was a corruption outcome that gave base values like flat es/arm/evasion. Mostly to allow to turn on masteries like "15% chance to suppress spell damage if your equipped armours have evasion". Could also be an alternate to %es outcomes where base is almost as good.