I would recommend this. Show up late to teamfights and cleanup. She has such a short range that being the one in fights, especially with how dangerous she can be, will make you target #1. Show up after about half the team's abilities are on CD, this way, most of the CC has been used. Especially if you can sneak in behind and ult condemn a carry, either ad or AP. Be cautious that your team is ABLE to keep their tanks busy, or else they may just turn and focus you.
If you want additional advice, I recommend visiting the stream I mod for a couple of Diamonds :
http://boards.na.leagueoflegends.com/en/c/tips-tricks/W7KqoJiI-free-coaching-from-diamonds
They coach on Saturday nights (Sunday this week) and should be able to help.