Isn't orianna supposed to use up a lot of mana in laning phase?

I as Azir managed to use up more mana clearing the minion waves than the orianna did, yet she spammed her Q and W at the minion wave and I used W as azir once for every minion wave.

Ori kept poking me with her QW while also getting the minion wave.

I was standing 4 teemos away from the minion wave at all times(so at most Orianna would hit 1 minion from her W)

I am wondering how do I even compete with Orianna when she can both waveclear AND trade with me, while I have to expend twice the amount of mana she does to get the same effect...

And considering Orianna's insane lategame, she can out-poke Azir at anytime in the game... bringing him to half health with 2 abilities with next to no positioning skills needed, While I as azir have to burn up 2 W, an E, and a Q just to poke back at the Orianna without taking any damage.

Please tell me how do I beat orianna. Here is a list of things I've tried:

1. . Farming passively way behind minions but she sets up her Q and simply walks SLIGHTLY into range of me and QW while I am actively moving away
2. . Poking her(in which she simply reacts with her E and shields nearly all the damage)
3. . All-ins but she out-damages me at every point in the game
4. . taking a lot of MR runes seems to work until she gets MagicPen boots way before I've finished an item and causes me to become behind as a result --END LIST-- Please if someone could give some advice on how this Matchup works, I'd love to hear it. I need all the help I can get against Orianna players.