Quote Originally Posted by Reynhart View Post
That doesn't make any sense. There is no "potency per blood gauge". The only potency your Blood Gauge offers is by using Bloodspiller.
You assume 50 blood = 400 pot (out of grit) or 475 Pot (in grit).

From there it is easy to extrapolate pot/blood. Souleater grants 10 blood so anything that pushes it back a GCD costs potency.