Build and Runes
Try to stay away from her when you’re marked with Harrier, as she will do additional damage to you.
Avoid dueling against a Quinn/Valor as an AD carry because her blind will render your autoattacks useless for a short period of time.
Quinn/Valor has an extremely short range – try to focus her in teamfights.
When Quinn is is Valor form, try to constantly damage her – Valor gains an incredible amount of movespeed boost out of combat.
Harrier will prioritize targets closest to Quinn when it procs. Stay behind creep waves if she has no currently marked target.