The item setup i made for her REALLY does damage late game i just did a game where in team fights the tentacles where hitting for 1k it was amazing.
Haven't tryed her in ranked yet but i can assume that shes really good if once people learn how she works cause her team fights are nasty.
Pros / Cons
High Damage output
Hard To Lane Against
Farming is easy with her
Jungle clear sucks (but is viable)
Farming / Jungle clear
Her farming is easy in lane jungle is a different story without the control of your passive its REALLY hard to clear because they sometimes spawn in places that are not effective in the jungle. But if you happen to get them to spawn properly she can jungle very easily.
She takes a lot of team work and i mean A LOT, you're most likely going to want someone of your team with a knock up mostly because he ult can be hard to hit but if you hit her ult properly you almost sure to win the team fight.