I'm releasing my spot here and right now.

You may say, there are others which are better. I honestly don't care, because during this event, it was all about the spot itself, not the amount of charms you get, because of all that fixing during the last event.

I think it will be fixed sooner now.

Anyway...

(this guids is somewhere optimized for druids lvl 100)

The farmspot is inside the throne of thunder. You set the instance to 10man nhc.

It's right at the first trashpacks. At the left and the right side, there are mobs which are called "zandalari water binder".

They have a spell called: Bind Water aka Bind Water - Spell - World of Warcraft

This spell is "channeled" with a 6 second duration and a one second trigger. Each trigger spawns a water elemental with 27.000 HP which drops a lovely charm. The entire Spell has a cooldown of 10 seconds.
In total there are two casters, so in summary this means: 6 Mobs in 10 Seconds, aka 36 mobs in 1 minute, aka 2160 mobs in 1 hour and 4320/hour since there are two casters.

The summoned mobs are doing melee hits only. The casters are mainly casting, but at some point they will end up in melee range. So you can theoretically kill them if you just spam AoE. So I'll tell you my method how to avoid this and make this 100% AFK without resetting. You can try it my way or figure out a way for yourself.

(a simple attack/stopattack macro should work to keep the casters safe tho, i.e. a warrior with victory rush)

It's...