So I went and did some testing with this mod. It states that when using your grenade, you consume your stacks of charged with light to gain up to 50% of super energy. Now I read that as I gain up to 50% total of my super when I use a grenade. So in theory, you can combine this with the Orpheus Rig to make it the original one from D2Y1.
What really happens is you gain up to the 50% MARK on the super bar. So it won't stack with any super gain exotics.
My question is was it intentional to confuse your players or do you not want us to have fun?