What would you guys suggest for runes/masteries and build path for Fiora now?

From what I can tell, CDR seems to be more important than AS since it allows her to dart around with Qs more easily, especially when ulting especially since you'll be just plain moving much more than say Xin or Yi and you can't animation cancel melee autos unless you're Riven. But on the other hand, PD seems to be really good since she just literally walks through her target instead of around their perimeter, which can allow her to decrease distance from point to point by about 10% in addition to simply making her move faster.

Then there's the question of more much AD and how much defense does she need. A hydra still seems ideal for her since it gives a relatively cheap amount of AD with sustain as well as helping her with waveclear. That said, while melting people with IE, BT, Hydra sounds fun, she's squishy as hell and just with hydra, hitting all 4 vitals with her ult on a tank will deal around 30% of their max health as well as adding another 300ish healing. Factor in the damage from her Q, E and normal basic attacks, and the tank is probably at 55-65% of their health. If the ADC can't burn through a tank with only two-thirds their hp, then you probably aren't going to win any team fights regardless.

Not to mention she can continue to proc vitals even after ulting and burn tanks even more.

So building pure defense after Hydra or Maw seems lke a good idea, but would she have enough dps to cleanup the enemy carries?