A simple way to do 'Common', 'Heroic', and 'Epic'.
If you want to represent these three different 'styles' but still have things like a common born farmer that has 'Demi-God' blood and potential...
... then I would propose using a multiplier on the damage the individual does.
An easy set of numbers would be
x10 for Heroic and x100 for Epic. (Depending on your game you could use other values like x5 and x15 but adding 0s is just easier to use at the game table).
This is roughly how many Video Games make the difference in levels and allow high level characters to take on Boss Creatures which a 'normal' person would never touch.
A creature with 100 hp for a common person is a challenge but for a 'Heroic' this is not much of a challenge as damage with a weapon is now 1d8x10 and for an 'Epic' it is trivial as any damage will kill the creature.
If you want to represent these three different 'styles' but still have things like a common born farmer that has 'Demi-God' blood and potential...
... then I would propose using a multiplier on the damage the individual does.
An easy set of numbers would be
x10 for Heroic and x100 for Epic. (Depending on your game you could use other values like x5 and x15 but adding 0s is just easier to use at the game table).
This is roughly how many Video Games make the difference in levels and allow high level characters to take on Boss Creatures which a 'normal' person would never touch.
A creature with 100 hp for a common person is a challenge but for a 'Heroic' this is not much of a challenge as damage with a weapon is now 1d8x10 and for an 'Epic' it is trivial as any damage will kill the creature.