As far as efficiency goes , Orianna shouldn ' t be in range of her enemies for long enough to get multiple autos off . Attack speed is a terrible stat on Orianna for this reason . In earlymid game her trades are really good because of her autos because it ' s 1 v 1 , or 1 v 2 , but because you can ' t consistently auto on priority targets lategame without getting engaged on and CC locked , it ' s just not safe . She has enormous spell range , AoE , and AP scalings , so there ' s just no point in putting yourself in the line of fire for mediocre single target DPS increases . Nashor ' s Tooth is also a really shitty item in general . It ' s expensive as fuck , sitting at 3000 g for 80 AP , 20 % CDR and some Attack Speed that you ' ll likely never get to use . Just get Morellonomicon and you get mana resets on killassists , heal reduction , 20 more AP , the same CDR , and a shit ton of Flat mana for 100 g cheaper . Not a single champion even builds Nashor ' s Tooth on their most popular buildpath because it ' s so awkward of an item and is extremely inefficient to build on champions not named Teemo and Azir because of them unique nature of their kits .