Mind is pretty heavily prioritized, it's just that it's always already there and can't be melded on most gear. So it's not really a factor except in a couple of cases where maybe a 340 item is worse than 330 item due to the substats, despite the 340 item having more Mind.
As for DH, it's pretty hard to get enough to make it have a noticeable impact, and you're giving up a lot to do that since it does absolutely nothing for healing. It's not really worth it for healers vs more Crit/Det.