[I haven't decided yet...]

i think you should add harem abd romance considering its villain vs protagonist the villain has big disadvantages here remember the protagonist has a plot armor and alot opportunities like the heroines connections and some treasures and you the villain cant kill the protagonist or villain will die from the will of heaven or will of the world and whats the best way to to weaken beat and kill the protagonist that is to get his opportunities like the heroines connections and his random treasures after that you kill him but if you made it not harem it will be difficult considering the heroines has the connections remember in most manhua manhwa manga anime and novel the protagonist has to seduce the heroines in order to aquire these two and that is heroines and connections while the treasures or whatever that will powered the protagonist is through the heroines so yeah if i were you should add harem and romance

All of the novels with villain going up against multiple protags have harem making the mc like some sort of chicken farmer who must raise them to get eggs/power. Pls do something different.

[Yap, that's exactly what i hate about that kind of novel, so our mc will seek only his personal benefit.]

be true to your words author need a real self centered evil mc not washed up who chases after girls in those other novels.

Just take the useless childhood friend heroine and infect her with syphilis flesh eating bacteria a Viral virus add a bomb to that and some Heavenly Poison

what??????????

You were worried about the son of luck getting support from the heroines but you forgot that they can be a weakness too i just told you how to use them. Seducing them can backfire on mc he’s literally taking them in only for the son of luck to swoop in steal them from mc and get major intel or make some hoe betray him at a critical moment

[ Don't worry my friend, I'll keep my word.]