AP Qiyana Post TLDR

Edit: Sad to say, it seems the lolwiki description of the wall enchanted tooltip is inaccurate. The bonus 60% damage is only applied to the Q damage. I personally think Riot should make this work the way I describe it below. If not, she still deals bonus 60% AP damage from her passive and W. I will still be trying AP Qiyana when I get a chance.

Previous post here

"Qiyana has 2 parts of her kit that that scale with AP, Passive and W."

Passive +30% bonus physical damage on first damaging ability and W+30% bonus magic damage while holding an element.

Fact, HOWEVER, the most important ability that I feel makes AP Qiyana work is her Q.

While Qiyana holds the wall element, targets below 50% of maximum health take 60% increased damage.

Using W to pick up the wall (after having a different element) element and using Q on a target with less than 50% HP increases the Q (136 / 168 / 200 / 232 / 265), + Passive (24 − 132.8 (based on level) + 48% AP) physical damage, and W (12.8 / 25.6 / 38.4 / 51.2 / 64 + 48% AP) magic damage.

At max ranks / levels that is 397.8 + 48% AP physical and 64 + 48% AP magic damage

Or 461.8 + 96% AP in mixed damage.