When playing Udyr with the Augment 'Windblown'

If you see Vulnerability<<<<<, you absolutely have to pick it. Build Liandry's + the AP crit item. Every time Udyr swaps stances, his crit rate goes up, and the crit procs on his ult damage and Liandry's burn — the damage is insane. Plus, awakened Q has AP scaling too, so if you double-tap Q on a tank, they're dead in one shot.