Only in my dreams... In reality I don't think I could deal with it.

Slaves in fantasies give unconditional devotion to their owner; reciprocation is optional. They are perfectly attentive or exactly as untrained as you want them. If they snipe at each other, it's only to give the fantasy dominant another opportunity to do unpleasant things to them.

I suppose it does work in reality when the slaves/subs not only have a good relationship with the dominant, but are also supportive of each other and get along well. Personally I'd be a total washout in long term polyamory as multiple Domme. Petty rivalries get my goat enough in other contexts; I would not want to deal with them in my private life. I think at the first sign of interslave backstabbing I'd throw the whole harem out, and that would be the end of that experiment.

As for ladies with power kidnapping lovers... now there's a story idea.