Hypnosis is one of those things that is probably best reserved for RP.

I’ve actually used a spell like that in Conan Exiles already, and its really not that fun to use. You get into a fight with some NPCs, charm one and it helps you fight. But because its not a leveled thrall with decent equipment it gets trounced pretty easily. Its kind of a waste of corruption and components, or time if the previous are free.

The only game I’ve really seen charm and hypnosis work well in is in Everquest. In that game NPCs are significantly stronger than players and even regular ‘mobs’ require groups of players to take on. So charms and hypnosis spells are super effective and worth casting. There are even characters that specialize and focus on such and are VERY highly desired in player groups for that.

Even pre-Age of War NPCs weren’t particularly threatening enough to warrant this sort of mechanic. The best form of crowd control in CE is to kill things outright.