Allowing the Twist of Fate buff you get from defeating a Forlorn Maiden to increase the amount of bicolor gems you get from fates as well as increasing their spawn rate has been a really, really great change. And I want more!
What I want is a super Forlorn Maiden mini world boss fate to have a chance to appear in any zone.
How I imagine it would work is anytime a Forlorn Maiden is defeated in any fate in any zone that rewards bicolor gems there is a chance to spawn a 'Forlorn Mistress' fate chain in the zone. The first part of the chain is just a bunch of the mini Forlorn Maiden adds. Completing it rewards gems, experience, and gives players the small Twist of Fate buff, and advances to the next part of the chain. The next part of the chain is against The Forlorn mini boss, and it gives players gems, experience, and the big Twist of Fate buff upon completing it. The final part of the chain is against the Forlorn Mistress, whose difficulty should be comparable to an A rank. Consider using the Scathach skeleton for her. Players get a ton of gems, experience, and an even bigger Twist of Fate buff upon defeating her.
Overall I think it could add more dynamics to grinding fates, and more opportunities to get rewards is always good.