Its a tuff one between magic and fiction but i think fiction is best

Entity Lordship.

Fictional lordship

Entity Lordship because to me, it's sounds like a badass lordship superpower.

Well... I'll look at each:

Entity Lordship is powerful and could probably beat all the others due to their wielders being 'entities' (unless its possible they could use their power to classify themselves as something else =/ ), but I dislike the idea of taking away another's free will, so that's a no go for me. Though... the user themselves is an entity, so they possess absolute control over themselves. They could rewrite themselves to possess any power. The power is still incredibly powerful, even if the user never touches the will of another entity.

Fictional Lordship is likewise powerful, under the assumption that it can bring fiction into reality - especially if it then retains control over it. It does say "they can potentially even change/make fiction into reality and/or vice versa." though the key word there is 'potentially'. Still, I would reason that if the power to merely manipulate unreality can bring it into reality, then a power that possesses absolute control over fiction/fantasy/unreality can certainly do so as well. It also possesses 4th Wall Manipulation, presumably at an absolute level, so that would also work to do it. Similarly with the boundary between fantasy and reality.

Magic Lordship can allow magic to do anything, possessing Almighty Magic.

Science Lordship is the same as Magic Lordship but with science. I enjoy science, but I find the idea of controlling it boring compared to fiction and magic.

So as much as I prefer the idea of the others, I would probably choose Entity Lordship purely so I can retain absolute control over myself. I would rather not risk there being something more powerful than me that can control me (except the Omnipotent, at least), and with Entity Lordship, there would be nothing that could do that. I could probably just place a law upon myself that says I can't use Entity Lordship to overrule the free will of another.