Archers are super weak in terms of durability - ok - they are archers, they are not supposed to last long. However, since enemies spawn all around you or jump from above, they just get oneshotted, and you cant even resummon them because they would get ANOTHER oneshot.

1) Improve AI so they just dont face enemy in meele range trying to shoot them with their 0 dmg.
2) Add "keystone" in modifications that would have 3 (or 4) small keystones below, that would allow you to choose to transform archers into mages - this keystone would have 3 nodes - Lightning (Mages would cast chainlightning or "Thunderstrike") or Fire (some basic version of "Consuming Embers"), Frost (Annihilation or arctic spears). That is it (or maybe Aether mage, that would cast heal on you once a time).
3) Once you have your summons ready and you recast your ability, instead of summoning, it will perform some summon specific action - This is very weak right now. It needs at least some multiprojectile thing, like multishot.
For zombies - the charge is useless, they are so slow that even basic minions will dodge their auto attack. :(

Minions damage is kinda meh, more meh than anything else. Their "special" skills are very weak, and sometimes the animation is so slow, when I recast the skill again, the previous one get canceled.