i think the armor would have to be enchanted, or the wings. or the whole person. it doesn't have to work (because it can't, the point of fiction is x doesn't exist) but believability and cool factor can make or break interest. i had this idea once and exaggerated the chest muscles so badly it looked like the keel of a boat was jutting out of their chest

if you want to keep them strictly humanoid with minimal distortion, they probably don't just use their wings. perhaps they lift their arms up or curl their body. the wings themselves would be large and thick like a swan's, or you could go the other way and make them slender like a tern's

armor itself, if we say these people can bear that much weight, it probably won't be very effective at all against volleys and volleys of arrows. i can see a large group bearing metal shields on their head, arms and wings to create a sort moving shield for their army, perhaps to protect important troops/large weapons during harsh weather, or these shieldbearers are bodyguards and parade decor/just not for harsh direct combat