Hello , I was wondering , do the acc charm place is supposed to be used for a barb?
I dont see any usefull thing to do with it.

You only receive the ee from the acc slot, so for a barb it isn't really useful at all.
You could keep a regen charm there if you need space in your inventory if you wanted.

you can still put a heal charm in the acc slot with any class. If your main healer runs out of mana but only need about 5% till level you can heal just a little. Trust me its always nice if everyone if the game can heal.