in pve wugong will be spread from any attack on the target, so if im partied itll pretty much instantly spread to a whole mob. Twin arrows is a quick way to increase the speed of the infection spreading and on bosses wugong -> multishot lv. 15 = instant spread to everything around.
jincan + throw gu pot will pretty much demolish any larger mob and also the bugs from jincan will tank any extra mobs that they agro.
Wugu’s aoe with just jincan + throw gu pot seems like it wouldnt be enough considering the long cooldown but when it completely decimates the whole mob there’s no need for MORE aoe.