Quiyana Questions!

When Quiyana first came out I was pretty Mehh about her, but then I played her and I really like her play style. However I’m not sure about somethings with her so I have questions!

Question 1:

Is Quiyana good for 1v1 duals? (How so compared in Jungle and Mid lane?)

Does Manamune benefit her? As I notice she can use her spells with spam potential she does lose mana doing so.

Is she good against tanks? She builds lethality but I don’t see her do much with that, especially against heavy tanks.

What’s her best build beyond the essentials? I normally go Youmuu’s/Duskblade/Sterek’s but don’t know where to go after. Tanky items? Crit items? Speed? Cdr?

This is pretty specific, but when she uses her W+Q for Invisibility, can Rengar see her in his Ult?

I see she’s suppose to roam a lot, is she suppose to roam before 6 or wait till 6?

When jungle, what is her best farm path?