Can anyone tell me "how to Vayne"?
Mechanically-wise what do you recommend to do with her? I know her combo is AA-Q-AA-E or AA-E-AA-Q or E-AA-Q-AA. I got fed 5-1 and faced a 5-1 Nasus, but Vayne is really weak without her initial core items PD/SS and IE. So I feel my mechanics were a bit lackluster as with Vayne positioning is key. (We lost the game).
If there's any game knowledge you'd like to share when using Vayne, please do so too. I find this champion really fun but very, very difficult to use.
(Literally, practicing and winning with this champ is a gamble for me as I have to hug my support and team so much.)
Any tips on how to be better with her?

destroy you). When fighting vs dudes with dash moves, stand next to walls so when they jump you can easily E them.