I think before you even consider all those, the 1st and foremost important thing is gearing. I wouldn't worry about all those yet until I'm properly geared to run efficiently and survive better especilally in HC. Keywarden, grifts and should be run in the best possible or elsse RIP. Specifically KW as you need to farm them at T6 and that wouldn't even guarantee drops. Btw, since ur playing DH and new its best to ask at DH threadd. Lots of help there and you will better understand how to.optimize your gear and understand its mechanics.