havent played since d3 release really. just looking for some hack and slash fun. i have reaper of souls but no necro. my wiz is lvl 50. not really sure what i should be working towards though. anyone have any pointers?

Pay for a 1-70 speed leveling service then hop to adventure mode

hit 70, then you should get a full set of gear by then from doing story - from there just look at the leaderboards and copy whatever build is being used (there is only one viable build per class)