Why is AP Trist Not A Thing?

I'm sure most of you can see where this is going. All of Tristanas abilities scale with her AP, her ult is +100% of AP, her jump is AP her E is AP. The only insentive to use AD Trist is her Q and if you bought Nashors tooth first item them her Q works excellently with it. I'm assuming there's one great reason and I am just clueless to it but please fill me in. Is it just because of her E's damage multiplier focusing on 0.33%AD compared to 0.15%AP?
Report as:
Offensive Spam Harassment Incorrect Board