Quote from SaikoDrakie
With the groundwork lajs out by the shield block I think I should be able to do that!
It seems like it would be a different mechanic than shield block though -- rather than reducing the amount of damage the hit lands for it provides a buffer health pool which must be depleted (either by one hit or several) before you lose health from your standard health pool.
So EH with Diamond Skin (Crystal Shell) might take the form of EH = (HP + 21707) / (1-DR) and not require any consideration of hit size. And HP and DR would be calculated exactly as they are now, with all the same factors already rolled up into them (e.g. %hp would be applied to hp before diamond skin hp is added on - I'm fairly certain nothing, with the exception of rune choice, can change how much hp you get from DS).