I've said so many times that I like strategy / intrigue / diplomacy / etc. stories that I'm almost sick of it. But that doesn't change the fact that "Noble Reincarnation: Born Blessed, So I'll Obtain Ultimate Power" delivered one of the best stories in this field! Guy is reborn as the son of the Emperor and happens to have a skill that makes him stronger when he has more subordinates. But that's not his only advantage, as he proves to have immense talent as a ruler. The manga is fantastic. The name is a bit misleading as his strength is more of a secondary aspect ofthe story, but I found the intrigue and his thinking, which is explained and explained in detail, incredibly entertaining.
Apart from the fact that it unfortunately has very few chapters, I can't criticize anything about this manga.