As for ADs I would pick up graves Mf or ezreal. They are just good champions to have around. Though I wouldn't prioritize them if you are comfortable with your line up. They would basically be champions you could trade to someone in draft pick if you wanted to secured something early. Or you could learn them too. Depends on how you feel about your AD line up.
For top, I would pick up Jayce. It's hard to counter him and he can farm easily. He also works very well on poke comps. If you've watched any tournaments since his release you know what kind of poke damage he can do. He's also fotm in mid right now.