The DH is enough DR seeing as Wiz are going to solo 105+ this season. Literally pure dmg addition and good APD managment will allow Wiz/WD/Dh 3s to see 110-113. With monk addition I can see 117+.
Obvisouly this is all like 2500+ paragon and 110+ gems and cubing 95+ gems on gear type of pushing. Few weeks into season we will prob see like 10-15 lower than that but still is gonna happen sooner or later.