Wayne - reading both your posts very carefully I get the feeling YOU would be a lot happier if Princess was rehomed. I think it's the way to go. She sounds an absolutley wonderful cat and I'm sure as a one cat family - with the right person, she'd blossom and come into her own.
Poor baby must feel so bad, with constant attacks.
I have read that often more than two females don't get along with others. My Bagel is quite happy to rub along with Ketchum and Dan - but let another female wander within her boundaries and she's like a mad thing and goes for them fur and claws!!!
Jst think of Princess and how happy she would be - without the fear of attacks. Keeping fingers crossed here xxx

Lynne