Heart of the Night

By the way, if you level up the mentor Karlam, after meeting Greta, she will reach around level 15, after which she will clear her hunting grounds like a bulldozer.

This is a feature, just like the fact that you can give Greta some artifacts or machines, for example. This makes clearing the city and the fight with the first Necromancer much easier, but it doesn't have a significant impact afterward, as Greta's experience gain is severely limited. That's why I left it as is. Besides, in the game, mentorship is completely useless for Karlam (and doesn't allow him to gain the Empathy skill!).

Remix, unfortunately, I don't have time to watch streams right now (busy before the New Year), but I'll check it out later, of course. The first Necromancer is defeated without any particular problems; there are a couple of replays on this topic. I usually defeat him with a standard light-aligned warrior build + a leader, chaos + machines is also a viable build (machines are obtained from the witch almost immediately), and a bit of luck – if the cursed skills proc well, he falls easily.