It may look weird to you but this is how i have always played her, I go 0/21/9 so i can be tanky and stay in lane forever that is why i also get Extended Mind, the more mana the longer you stay in lane with mana so you can just spam Blade Surge.

You can Swap out Greater mark's of Strength For Armor Pen if you want but you decide that and i have been doing fine with the AD marks it helps last hit with Auto Attacks and Blade surge

Flash ignite work amazingly well with this build, ignite to secure kills and flash to get away and also get kills i prefer flash over ghost because this build pretty much makes it so you have ghost on 24/7

PROS-
- Cant be ganked
- Hard to catch
- Lots of CS

CONS-
- Dies
- Mana problems
- Weak early game, good Mid game, AMAZING late game.

AND THAT'S IT i hope you enjoyed it and try it. well good luck leave feedback if it is good or bad thanks and bye