Honestly, it's a lot easier than before. Rush your AP jg item and BichLane. Focus on farming and counter jungling pre-six. After you hit six, ask your lanes to let the enemy push. While they're pushed in to your team's towers, stealth behind and proc w on a target. Theoretically, they should start running to their tower .(straight to you)
This gives you the easiest opportunity to proc your w. Try to q, and follow up with e, because Q boosts the damage of your next 3 attacks, and e will proc this. After you e, q while running to your team members for backup, as your w's charm will make the target follow. If you and your team don't kill him, try to ult TOWARDS the enemy tower, as this will warp you to the safety of your team.
This is all hypothetical and really only works if you and your team cooperate. After a few towers are down, catch squishy targets off guard when they try to split push and farm in a solo lane. Position yourself where they will likely run towards you.
IF THEY DON'T RUN!!! Then either they KNOW they can handle you or escape, in time. If this happens, I wouldn't engage.