As orianna, The first item component will allow her to deal more damage and spam her abilities due to the increased mana.

Level six is a massive spike due to her getting her hands on her Ultimate d. This will let her make plays of her own or in combination with her team.

She isn't really great pre-six as she can easily be caught out and killed. Post-six is a different story, and the Ultimate d can ultimately tip the balance of a fight.         As orianna, The first element will allow him to inflict more damage and spam his abilities due to the increase of the mana. The level six is a massive peak due to his grip on his Ultimate d. This will allow him to make games of his own or in combination with his team. She is not really big before six because she can easily be caught and killed.