I don't know how many hours I've put into it. Maybe 5 or 6 total? I have 5 Atmas. Logged in this morning before work in East Shroud, did the Mead escort leve, got my Atma, logged out and went to work. It was pretty satisfying.

I've been doing this pretty casually as I'm more interested in grinding out gear from Coil. If you go at it all day it's of course going to wear you down. Doing it in smaller spurts seems better, but if you can handle the grind then more power to ya.