What enchantment to get on helm for a summoner with srs, spectres and zombies

Im not sure what to aim for.
I use zombies for defense, specrtes do nice damage but i use SRS as my main killing thing.
What shuold i aim for?
i might dump spectres soon and go SRS + golems with zombies as meatshhields.
What are the best SRS enchantments?

/thank you for your help

I wanna say don't use any lab enchantment, and use a rare Bone Helmet instead. Gives you great ES if crafted (or life), 40% dmg to ALL minions and a possible +2 to minion in helmet.