Plat Trophy on Wukong

in order to get the plat trophy one of the sub trophes is collecting all armors and the one which easily missable is the Venomous Armguard, which is droped by Venom Daoist on the first encounter, the condition for the drop is to brake 4 of his 8 arms, for that you need to hit him on the back or use the win tamer for my part i did both, you'd better switch off the cloud sync to have a chance to come back or you will have to finish the game and get the chapter 4 again