How do you play Orianna like a boss??
 

I feel I just don't deal enough damage with her :(

Get a solo lane, farm, max W first, grab a catalyst, philo stone or some doran's for mana regen. Wear down your lane opponent with Q > W and then Q > R > W > Ignite. In teamfights, Protect the carry or Q in as many as you can then R > W.

Buy stuff like, Rabadon's, Void Staff, Zhonya's, BV, Ancients possibly? AP per level runes? I have enough damage. But getting a solo lane is your best bet, Orianna farms very fast. Get a level advantage?

I've always built her like a support (Auras) because her .6 ratios aren't gonna have anyone qq-'ing past level 13, especially if you are so predictable with your movements of The Ball.

I see no reason to do so, she'll deal great damage early-mid, from mid-late she'll start to teper off but she isn't someone you can ignore. Once you hit late game though, she becomes more of a support. But a 500 Q/W/R (just a random number) and her ability to easily pop banshee's, plus having one of the strongest shields in the game aren't anything to sniff at. And AP helps you get there.

If you play her in a sidelane though, I'd regulate her to more of support role. She isn't someone I'd ever go Soul Shroud/Aegis/Shurelia's (though maybe if I had a philo stone lying around). Leave that to supports without decent ratios.

Oh right, I thought something was wrong when I leveled Q first all the time.
why R > W instead of W > R? I usually miss R if I don't land W and if I don't land W I at least know it's better to not try press R.

If you use your W first the enemy can flash out before you get to use your ulti.

Never played her my self but for what i seen you max that move that spins in the floor?
after a few lvl it starts to do alot of dmg so just be a aggressive and poke alot with your ball lol

R acts as a mini-stun plus the range on it is larger than that of your W. Orianna is great at harassing someone down and then blowing them up. :P

Oh right, I'll keep that in mind.

Do be careful though; I did some testing and her R can pull them outside of the range of her W. Her W really does have pitiful range. I don't know if you are already, but get a point in her E (Protect) before six. It can help farm and reposition The Ball from a bad Q.