Would it be possible to add more content to leves for DOW/DOM to obtain materials rather than xp. Since the game already has enough ways of earning xp for those two class types I feel what's lacking is a way to obtain certain materials which drop off mobs.

If say level 70 leves were added that allowed you to farm them for a certain amount of time, not even objective based maybe just "Leve authority" where for 10 minutes upon activation you have your own little instance of mobs to farm X material you are in need of.