Seems like you're on top of it to me. It does depend on your gear, this server is very twinky so I would guess most players are wearing + INT gear with the richer ones straight mana/hp gear. Necro like shammy usually keeps mana and HP near each other and whatever the camp allows.
I think my lineup on mobs for my necro was pull with darkness/blood depending on situation, sick pet, looking for a pet bash to get off first fear clean. Add lifesteal dot and only enough dots to get it dead.
If you have friends and/or time you should get this item.
http://wiki.project1999.com/Words_of_Darkness It frees up spell gem for mana/hp spell, instant cast so you can use for spell reset, useful till 34.