Yeh I run with 5 necro and 5 julianos with 1 monster set for magicka bonus.

If you are having to ask questions like this you probably don't realise you need to have all your pet based skills (such as Fletcher infection, blue Betty etc) on the same bar for the damage bonus from the passive. With 5 such pet skills plus the bear ultimate on the same bar adds 12% extra damage.

Don't forget damage bases off max magicka so with necro set all golded out with mag glyphs too you will hit like a truck.