After playing for a while, I think this is one the the strongest if not the strongest necro minion build out there. Much less clunky compared to the fire wraith build and doing ALOT of more damage due to crit.
I optimized my gear a bit, here the footage (https://youtu.be/ElFVrEpLh2M). I down Lagon pretty fast, almost really never went into the adds phase.
For damage, the flat base damage is a must take from necro passive (Unearthed Arms and Moonlight Pyre) + adaptive spell damage from the base necro helmet. It will boost the damage by a lot.
For minion survivability, minion dodge+leech on crit overshadow the +health/health regen significantly. You don’t even need the +health/health regen on gear just try to always prioritize the minion dodge. I have over 1400 dodge but I think 1000+ should be fine. Since this will give your minion enough time to leech thier health back.