If you're looking for a realistic approach to a Necromancer main character living in one of the most grounded adaptations for how a real world might operate under game-like mechanics, then this is the story you're after.
Plot - 9/10, Characters - 9/10, Setting & Magic - 10/10, Writing - 8/10, Enjoyment - 10/10
Plot
Our main character, Tyron, is 18 years old, which means that he will receive his divinely ordained path in life in a public magic ritual. Picture the sorting hat event from Harry Potter, except everyone who turned 18 that year gets an assignment that will be their class for life. Unless they are assigned an "illegal" class, in which case they need to have their class and accompanying abilities magically ripped out of them, becoming a magical cripple who will never meet their full potential, but who can still pick up a sub-class as a baker or something if they try hard enough.
This world is also under constant siege by creatures called rift-kin, who, you guessed it, invade the world through dimensional portals that gradually widen if left alone over time. Luckily, some people are given martial or magical classes that provide skills to fight against rift-kin, and defeating rift-kin is the fundamental way for a person to gain levels, stats, and skills in their class. Unfortunately, there are more rifts than there are powerful slayers, with new rifts forming all the time and old rifts growing larger if left alone, which results in even more powerful creatures crossing the barrier.
Characters
Tyron is the son of legendary Slayers, so it's basically a given that he will awaken a powerful class and follow in his parents' footsteps. Some of his small-town friends are counting on it so they can form a party with him and leave their piss-ant town behind. Unfortunately, as the book's title and cover show, Tyron is given the Necromancer class, which is on the forbidden list. With only five days to officially report his class to the government, Tyron has to decide whether he takes the safe route, allowing his class to be ripped from him, or whether he will risk it all to follow his assigned path and hopefully show everyone that a class isn't inherently evil.
There are a variety of supporting characters from the extended family who essentially raised Tyron while his parents were off Slaying, as well as other Slayers, Slayer hopefuls, and then more regular folk with mundane jobs just trying to get by. One thing that I really appreciated with the character work was that every character had realistic in-universe wants and desires. Even characters who were fairly unlikable had reasons for their behavior and I never got the sense that anyone was simply a walking plot device.
Setting & Magic
The worldbuilding is where this story really shines, with extra attention given to the practicalities of practicing necromancy and living in a world with classes and levels. Anyone who has read many gamelit or litrpg stories probably has a tolerance for floating blue screens and monster bodies that dissolve into particles, but this is one of the stories that tries to make everything as grounded as possible.
Rather than simply saying "Status" and having a transparent blue screen appear in front of the character detailing their abilities, characters in this world perform a ritual with a piece of paper, a verbal recitation, and drawing some blood from a finger. The blood is pulled from their body and creates words on the paper, providing the information on their abilities, skills, and whether the gods believe the person has completed enough noteworthy achievements to earn some new levels or abilities. New sub-classes, stats, and/or abilities might be offered and the person marks off their choice in blood before having a bit of a pleasurable siezure as divine power makes it so.
Writing
The writing was pretty solid with no glaring errors that jumped out at me. The prose was functional with no real attempts at being flowery, which suited me fine. I appreciated the balance the author achieved with minor bits of mental exploration without devolving into prolonged navel-gazing. There were some interesting moral quandaries for our character while practicing necromancy as he had to decide what actions were acceptable to him and what might be a step too far. His goal is to become a powerful Slayer and show that a necromancer doesn't have to be a criminal after all, so he can't go slaughtering towns full of innocent people to provide resources for an undead army.
Enjoyment
I thought this was a fantastic book and I was riveted the whole time. It was refreshing to have a character who behaved rationally and proactively. There is no shortage of reactionary gamelit protagonists who have the plot happen to them. By contrast, Tyron is backed into a corner very early in the story when he receives his class and has limited time to make decisions, but he does what he can with what he's got. Once he makes his choices, he acts and commits, quickly reaching a point of no return.
I can't wait to go deeper into this series as there's a fair chance it will end up being one of my favorites.