For supers could you make this a defensive roll (deriving from an ability) and even given them skills to use? For a super stong super make it a Muscle roll, each success reduces the attacking success. They are still hit, things around them suffer it's just they shrug it off. Maybe they still take a point of stun for each success.
Still wouldn't avoid a splat effect on a good attack, but depending on the grit level that is not a bad thing. This way there is a good chance of survival though.
maybe a good way to further randomize damage at low levels if desired as well.
I was thinking a small change to armour rules, have armour reduce base damage before applying success. As to Ironman type suits possibly treat them as vehicles.
That sounds good, doesn't alter the rules much and easily adjusted for whatever level of survivability is desired.
i'm going to poke around at an x-com(pre Apocalypse)/ufo aftershock(post apoc) hybrid see how these options work with the power suits