DOS2 already has the necromancer with summons, like the bone spider. So yeah, they might restrict the number of summons though cause it might be difficult to handle at high level and slow combat considerably.
Concurrent turns, make all of then act in a single round. But i din't liked much necromancy on dos2. Not only by the fact that you can only have one summon, the cooldown and the progression being only bigger numbers are huge flaws for me.
On gothic 2 - returning (russian addon), you have the following creatures to summon as a necromancer(Xardas apprentice). Water mages and Fire magicians has different summons
Circle 1 - Weak skeleton
Circle 2 - Zombie - Slow, deal little damage but very resistant
Circle 3 - Skeleton warrior with weapon proficiency and armor
Circle 4 - Demon - At start, only a lesser demon but giving demon essences allow you to create even archdevils
Circle 5 - Army of darkness. It raises 3 skeleton warriors and one skeleton magician with the circle 3 spell Spear of Darkness
Circle 6 - No summoning spells on circle 6 but black mist is one of the best AOE spells...
Note that to summon the demon, you need to learn demonology and preferentially demonic language too.
Pathfinder Kingmaker has a similar progression. Summon monster IX can summon Thanadaemons and summon monster I can summon only weak monsters...
![[Linked Image]](https://i.imgur.com/UG7KIiX.jpg)
https://www.kickstarter.com/projects/owlcatgames/pathfinder-wrath-of-the-righteous/posts/2749839 The kick starter is running out of time so I suggest pledging ASAP.
Bonus more intel on the Angel Mythic Path.
https://www.kickstarter.com/projects/owlcatgames/pathfinder-wrath-of-the-righteous/posts/2779637 Also for Mythic Paths there a Gold Dragon (improved Bab, your a Dragon, you can summon Dragons), Aeon (lay judgements on folks, time travel to change the past, compared to a mix of Judge Dread and Merlin), Azata (7th Level Spell casting, a Havok Dragon Companion, kind of a Celestial CG Nature Bard), Swarm-That-Walks (your literally a Swarm of Hungry Vengeful locults that spread by eating their enemies, can eat their way into enemies to control them, and other creepy awesome scary shit), Demon (You take on Aspects of Demons when you rage, you summon demons, can turn into different demons, do you control your rage or give into it, increasing chance of losing control when you rage the longer you rage), Legendary Mortal (kind of a secret what these get).
OMG... That is so epic. kingmaker already has one of the best necromancies ever. It would be so amazing. If has corpse only skills and vampirism it will gonna be perfect...
Thanks a lot for your answer.