I am wondering if someone can answer this.....
I think the best Kernel to use is the LL one. Is this correct? What I mean by "best" is the one that will give the best battery performance.
From my limiterd knowledge, the High, Medium and Low are provided to match up with whatever chip was manufactured for your specific phone. Most were produced using a High Leakage chip so you would get better results using the HL.
So, just like most kernal settings, we have to mix and match to see what works best for us. I started with the HL and moved to the ML and have been getting better results. Hope that helps.