I was able to get both the nuns and Sally by inviting Brittany.
I didn't blackmail her, but did ask her about Titus after discovering she used Ash. Might have to use Kitty to find out, not 100% sure on that part.
Anyhow, just before the Titus mission, I set a checkpoint, went out to the club and met Sally, then loaded the checkpoint right when I had to choose between helping Barberry and Rachel. After loading the checkpoint, I invited Brittany to the Titus hunt and got the nuns, then right back to the Barberry/Rachel choice.
Hell, I was even able to help both Barberry and Rachel while getting the Sally scene with Keera, then the Brittany drug choice after taking over or destroying the empire. So much cake and eating it
Not sure if there's another way to get both, but that's how I managed it. The botnet mod can be tricky, especially when choices can run out or there's mutually exclusive paths. The sorority party was notoriously difficult for me to get through using the mod cause the choices can run out and leave you stuck, even reloading an old checkpoint wouldn't fix it and I had to restart the entire day with an old save.