Looking for Help With My Champ Pool!

Hi! I main mid, and over the last season and a half, I've bounced around and played probably every champ you can think of mid. My main issue is not that I can't play any of these champs, but more of that I don't play any of them exceptionally well, so when it comes to late game fights that I need to preform in, I often can't due to not really focusing on any specific champs.

My go to champs right now are : Ahri, Fizz, Viktor, Zed, Ekko, Azir, Jayce, Cass, and Ori. I really enjoy outplays, controlling oponents, having at least a somewhat strong laning phase, and having an impact for almost all stages of the game.

For a final pool I'd like to keep it down to 5 at the max, anything more would be a bit too much for the type of champs I play. Any suggestions on what I should narrow down to? I have every mid in the game as well, so I'm open to learning any champ to round out my pool!

I'll leave my op.gg below as well, thanks in advance for any help on the topic! http://na.op.gg/summoner/champions/userName=legendoleague