No good Charms

Playing SP. Running Hell Bosses, LK, random TZs, AT and occasional Cow. I try to vary a bit since I get bored running the same thing over and over. I'm level 92 and doing MINIMUM P5 (mostly P7/P8) and have been doing this in Hell for quite a while now but I almost never find any good charms. No skillers, not even decent res small charms. Keeps dropping GC's with 2 strength or similar crap.

I've read it can be more beneficial hunting for charms in NM but overall it feels dumb to drop to down to NM and lose out on other drops. But if I do, am I looking at potential 10's of hours of farming even in NM?

Is this normal?