useless but for my own entertainment to maximize skeleton dps
A well built "summoner" has a merc able to kill your target after amp + telestomp faster than your skellies can even land a hit
Then CE, supported by amp + conv kills the whole screen, again, without skellies having a goal other than being a meat shield
But I do understand, if you just want to try to maximize your summons for fun and you don't care about maximizing what matters.
In this case, if you want to find it yourself (you kinda need to cuz nobody farms/keeps this), here's what you should do...
Create a lvl 1 char, ideally one that is strong early like a psn creeper druid, complete the imbue quest as fast as you can.
All the mobs you kill along the way are at the optimal lvl to drop voodoo heads with bonuses to T1 staffmods.
But at the same time, you get an imbue quest on a low lvl character, which is allowing you to use it on a either a Bloodlord Skull or a Succubus Skull.
Their high qlvl paired with a low lvl imbue quest is unlocking the capacity to roll +2nec and +3 to T1 staffmods.
This way you get optimal odds of finding your iso, while also possibly finding better than your iso.