I see, unless we have some details on the sage c2 skill, it’s hard to say what it’s future will be, cause it’s spot now is a bit weird 
, despite having a red circle, it have low dmg, like kino.
But, there is a new attribute Corpse Tower: Skeleton Soldier, that can spawn skeleton when it land the kill (unless they change it, haven’t read through new info yet), so it might not necessary need a sage to have more skeletons. But we still have a month before the patch reach us, so we can wait and see whether those skill will get change again.
Edit: a video of necro3 with an army of skeletons, but the AI still look the same.