Why Orianna has strong early, mid and late game?

Explain me. Viktor's early game is mediocre. Azir's early game weak. Ryze's early game is weak. Ahri's late game is mediocre. Anivia has big mana problems before blue buff. Meanwhile Orianna hasn't mana problems. Orianna's ult cooldown is very low after buff. Orianna has good early game, strong mid and late game. I don't like Syndra's broken ult but even Syndra falls at late game. Nerf Orianna ult cooldown and mana rates. I'm explaining reason. Because double standard exists.
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