You are thinking about the choice the wrong way. Instead of thinking about control and submit with Nyx, think of it as do you want Pip linked with Nyx? Do you want to leave Nyx powerless? What will happen to Nyx if you don't give her Pip? What will happen to Pip if you do?Is pip content going to be tied to having her link with Nyx? I don't want to go on the path that leaves her out somehow. I am kind of confused where that choice puts the characters, especially when Nyx has two paths already. My gut instinct is that linking is more for the "control" path and not is more the "submit" path, but I have no clue where that'd put Pip if I am looking for the maledom path.
I have thought about all those questions and plan to answer them in a fulfilling way.