Control Mages: Pick one
This is more of a gameplay thread than balance. So, I've been a zed main for quite a long time now and I've gotten to the point where I can win lane pretty easily (granted, I'm only bronze 1) but later in the game it becomes more difficult to hard carry because, choosing Zed I'm almost always in an all ad comp so tanks can just straight stack armor and destroy me and my team.
That brings me to my point about control mages. Also lately, Viktor, Ori, and Azir have all been picked up both in solo q (Ori always tbh) and LCS/pro scene. And although I'm a Zed main, I'm not completely versed in the details about these control mages. I'm the kind of person to choose one and practice the hell out of it until I'm really skilled on that one champion, so skill caps aside, can anyone help me choose a mid lane control Mage out of the following: Azir, Orianna, Viktor by telling me their strengths and weaknesses, and perhaps what each one excels at that the other two don't have? Thanks in advance!!
she brings plenty of CC to the fight and has decent damage plus wave clear and she has a passive that lets her cast a free spell and she has a better version of 
as her ult
great waveclear, provides constant dps in fights with his soldiers, can destroy towers fast enough and make his own, Ult is great at making picks and changing the flow of a teamfight, one of the best lategame scaling mage, great zoning with his soldiers dps especially with nashors and rylais make his soldiers really annoying to deal with. Cons to him are very hard to play you need really good mechanics to be good at Azir, relies on soldiers for dps, not enough burst damage like a lot of other mages, has a history of getting nerfed tho while still being frequently used in competitive tho soloq is far different compared to competitive.
has good waveclear aswell, can shield herself and allies, her ultimate can practically win a teamfights if you land the ball in the right place especially if you land your ball on you main engager like say a malphite with a ori ball on him than he can just ult and ori right after,her passive is pretty nice for csing, great zoning with her ball. Cons would be her ball can sometimes be easy to predict where its going, need to keep track of your ball in fights since its your main tool of damage not much else I know about her since I don't play her but that's what ori has.
has great waveclear get your hexcore upgrade to your and just clear the wave, great burst damage. Good zoning with his laser, W , and his ultimate, seriously people underestimate his W a lot. Great lategame scaling mage that is still good at other parts of the game, flexible item path even tho has 2 spaces filled by his boots and his hexcore just give him a rabas and void staff and just fill in what you would like. Cons for Viktor would be he is gold reliant needs his hexcore to help him scale tho they are 1k gold but still, can only build really 4 items not counting boots and hexcore, no real mobility and his gravity field can be easy to maneuver around at times, E can be a pain in the ass at first aim to but with practice it gets easier, No real way of defending himself besides his W, only form of waveclear is his E so once its done that can be your moment to poke him down.
his Q and E late game deal crazy amounts of damage, and he's guaranteed to get a few off in a team fight with his passive, plus at your Elo a lot of people will QQ because of his ult, so you have the psychological factor
for lane, play safe and focus on farm as your goal is to get to late game with a lot of items, use TP to get back to lane for farm after dieing or backing for an item.
build 
and some AP items 
are all good items, as for defence, you can get away in most situations with not even building a defensive item.
is one of the best, thanks to his true damage and all AoE skills it can be pretty easy to carry games when you're fed. And like Zed, you win lane as soon as you hit level 6 most of the time. This guy carried me from bronze 4 at the start of the season to Gold.
My favorite build:
