I say when you first hit lv70 its best to start adventure mode and do some bounties till you get a few start gears. After that look online for builds. DH is pretty decent with a standard Fire Cluster Arrow build. You need to get Repear wraps which drops from the last if you kill it at lv60, then anything else that gives fire is nice. Items like Andy helm are good. aughild is great for all starter classes, blackthrones are pretty nice too. Once you can handle T1 rift I say you should start aiming for best in set items, again there are a huge amount of guides for this online.