This little "mod" changes block so blocking does not drain vigor.
I can't really guarantee that it will work if you are really totally out of vigor.
And as for what it does to the balance, well it will unbalance the balance, thats for sure ;)

How to Install
Unpack zip into The Witcher 2\CookedPC
The required subfolders are contained

In order to do this I had to disable the "vigor-regen-timeout"
Feedback might be nice as to what this breaks (if anything)