I disagree. I actually agree with the 4E tiers.
At Heroic tier, you follow the rules of the world. Ressurection is serious, scary stuffs, beyond your ken.
At Paragon tier, you can bend around the rules slightly. You can journey to the underworld, and make a bargain with Hades, and hey, that's a 43 on your Perform check, so you have his approval...under these conditions.
At Epic tier?
"...he punched out Charon, seduced the shades of thirty different women, swam the Styx while carrying three amphora of wine, drank the wine, sought out Eurystheus's father and murdered him again, shattered Sisyphus's boulder with the explanation 'Yeah, Dad can be a real dick sometimes.', and then stole my dog? On a dare?"