I hope I don't come across as offensive, but----
This is a problem, how?
IMO, this search for the holy grail of invulnerability is against the "feel" of the Hero System. It "feels" like D&D, with its Magic Missile that always hits, and its Shield that always blocks, and the ThisSpell that always xyz and the ThatSpell that always ____ and so on ad nauseum.
Hero System, OTOH, is a coherent SYSTEM, with balance built in. Which means that, while there's no limit (other than AP caps and other GM decisions) to how powerful any Defensive Power can be, you have to pay for each increment.
Frankly, I consider attempts to violate that "feel", by looking for any "always works" power, to be an attempt to break the System.
But, that's just my opinion. I couldn't stand around and not speak up in defense of my favorite gaming System any longer.
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A user will find any interface design intuitive...with enough practice.