To all the asshats replying with "use a normal grind profile" you really do need to read what the OP is asking for.
The original way to farm these was killing slags in the halls of lightning, but as the charms only drop from mobs that are green or better (level 81+) this is now an invalid way to do it.
The OP was requesting a profile that WORKS. Stop being so unhelpful, if you can only say obvious things that don't benefit anyone, you'd be better off shutting up.
Edit: I can't write you a profile for this, but the "Verlokk" mobs that are insta-respawn in deepholm are a great aoe farm place for charms - just expect the area to be camped to high heaven because everyone's doing it