I know various ideas have been put forth on this. Here's mine.
VSE MK2: Requires lvl 10 Sweating profession. Has a small random chance to pull Rare Vibrant Sweat, which is used in a new BP called Sweat Energy Cells.
Sweat Energy Cells Bp: 100x Vibrant Sweat, 3x Rare Vibrant Sweat, 5x Force...