Not Updated For Current Season
The masteries shown here are not yet updated for the current season, the guide author needs to set up the new masteries. As such, they will be different than the masteries you see in-game.
Welcome to my Orianna guide, i still work on it so, your comment are welcomed.
Orianna seems be a support. Nonetheless, her passive could transform her into a dps.
That's why i wrote this guideline. For people who would like play a dps with Orianna and not support.
Her passive uses power ability.
So i prefer power abilities runes to magic penetration.
Changes are possible, perhaps it better exists.
Orianna isn't a tank : defense is useless.
We would like do autoattack damage : improve the attack masteries.
I have tried many build, and, if hextech would be a good idea, i think guinso is better.
Basically, i think a dps Orianna needs abilities power, which boost all her spell, but also attack speed.
Why the first item ? She needs mana.
Why guinso ? Cheaper than hextech, it provides damage (autoattack !) abilities (sorts and passive) and attack speed.
Why Nashor ? Orianna is originally a support design character with usefull spell. Coolddown reduction and attack speed are very usefull.
Why boots of swiftness ? Mobility. And nashor allows us to have a cooldown reduction...
Lich bane gives us mana, abilities and...a huge capacity of damage ! (abilities is add to autoattack !!!) and resist, and mobility...and perhaps coffee ?
To conclude, is the game allows you to buy it, hextech gunblade gives us a significant advantage. But it costs a lot.