How can i improve my build of necro - wizard skeleton's?

Im te same guy when i was asked for the hand of naz, and y got one, but in this time i need some help or tips for my build because i can't do it the pit 55 level, and I try every optios i remember to a old build, i played the game in the beta, and i drop the game in the senescal season but im playing again for the expansion (i pucharse it) I can't unlock IV torment and i got one shoted for the debuffs or proyectiles however my dps is not bad, plz help🐟