Re: A place for charms?
Yeah, forget NM LK. If you want to collect a lot of good charms you're looking at least hundreds, probably thousands of runs, and if you're going to spend your time on doing that you might as well do it in Hell LK where you at least have a chance of finding a high rune.
When I run LK, I collect all flawless gems and, along with checking for good charms, I keep at least one of the crappy charms in my stash. I cube up the flawless gems to perfect as I'm able, and when I get three pgems I reroll the crappy charm. Alternatively, you could just stash all the flawless gems and then have a big cubing spree as a break from LK.