Should Qiyana max E first?
It seems a bit weird, but her E is her only spell whose cooldown goes down with rank.
Her Q only goes up by 20 damage per rank, and the bonus effects don't get any better with rank. Her E gets 35 damage per rank. Even with the Earth Q's damage bonus, that's not as much damage as the extra damage you're getting from a rank in E.
Her W only increases the on-hit damage by 8 and the ooc movement speed by 1.25% per rank, but ranking it up increases its mana cost. As a crucial part of her combos and with Qiyana's harsh mana problems early on, you want this ability as cheap as possible. Her E also increases in mana cost, but its cooldown is also longer and she doesn't use it on-cooldown.
I'm gonna start maxing E first to see how it feels.