I'm not a 100% either if dolmen chests count (probably not)...i do know if it did that would take much longer to grind.
This should help you OP. There's a little route you can run to make the grind quicker. IIRC it took me about 25 minutes or so following Arttea's path, GL!https://www.youtube.com/watch?v=7OA3Yx5PzpQ
Lady_Galadhiel wrote: »Not 100% sure but I think it's only overland chests.
At least,that's what I have heard where people got it from,included myself.