Keep in mind some physical weaknesses like for example lack of physical strength (Despite looks or whatever it may be compared to others like trolls, giant etc of course you'd have more strength than the average human since your a relatively high powered monster but of course super strength may or may not be one of them) weakness to wind manipulation, etc would be for the best. For example I added wolf's bane to the list of weaknesses to just give my guy another weakness.

Also I believe that a incubus's powers of physical allure and mental manipulation would only affect women with few acceptions amongst men After all Kurumu in the series never used her powers on a woman as far as I know of. I'm not sure how well this would work in combat because we also haven't seen her use her powers in battle against male combatants as far as I'm aware.