Was it powerful?

In the novels, there were some Mages who changed their profession, such as "Quanmin: I'm a Necromancer, and I can level up my skills indefinitely","Quanmin: I can raise a Summoner infinitely", and "Quanmin: I'm letting you change your profession, but I'm not letting you cultivate!" For Warriors, there were National Class Advancement: I Necromancer, Unlimited Skill Upgrade, Global Class Advancement: I Exterminate the Apostle, and National Class Advancement: Invincibility Begins from Super Fusion. For Shield Warriors, there was no mention of it. For Summoners, there were National Class Advancement: I Can Cultivate Unlimited Summoner and National Summoning: Succubus Begins to Become a Berserker. For Priests, there was Global Class Advancement: I Exterminate the Apostle and Open a Dungeon at the Pirates. For Assassins, there was Open a Dungeon at the Pirates. The Archer class was not mentioned. The skills after class change are different according to different novels. Please check them separately. I hope you like this fairy's recommendation. Muah ~😗