Dumb question...what does this mean? All shields recharge. Obviously you mean something else.
As for the guy asking me what my build is...Im going down cunning, I was going to for for execute first. I like the idea of it. But if cunning is better, so be it. Mark of Death looks damn fine as well.
I like the melee, but not necessarily by itself. To be honest...I would sum this thread up as "I like Zero, and want a good strong build that can melee, but can also destroy the universe with a good SMG. Also, eventually, I want those throwing knives."
Zero's pretty tricky. When it comes to developing him, you almost have to ignore one whole tree, otherwise, you'll be shooting yourself in the foot. I've gone both snipe and melee, and I enjoy the stacking deception skill where you can basically clear a room in seconds.
My advice is to save some of the better skill items that you find for both melee and snipe, and at some point, re-allocate those points to switch it up. I you deception for both offensive and defensive purposes; it comes in handy. And a very good point of having one rocket launcher in your pocket for second wind opportunities is a good thing.