Sooooo, it’s pretty broken. I had my doubts about it’s legitness, but a friend showed me in a custom that it’s possible. Essentially, you take full class cdr perks, and spam it. Then once you have below 600 shield, you use the class ability and it boosts you up to full shield like so. Apparently, because you’re not at the 600 shield cap, you can trick the game into giving you more personal shield.
First time I encountered this, I though the guy was hacking tbh. It honestly needs to be nerfed, as now it makes it difficult to even focus hank himself.