Loosely dry-pluck the big feathers, then I do a scalding wax to pluck the down. Careful not to remove too many down feathers when you dry pluck, otherwise the wax won't stick. If you do, you're better off just dry plucking the whole dang thing, then torching off the fuzzies. Probably need tweezers for the "stems" that stay in the skin
Honestly, you're best off reading up on Hank Shaw. He's an outdoor food writer and has written all kinds of stuff on cooking ducks and waterfowl. His book DUCK, DUCK, GOOSE is VERY in depth and gives all sorts of guidance.
But the short answer to your question is that if you can get a dry plucked woodie cleaned & gutted, your best bet is to dry brine with whatever flavor profile you want, let it rest a couple hours, then roast in a cast iron skillet. Because legs need longer to cook, I like to cut up carrots, celery & onions to set the bird on, then use just a shallow puddle of stock to help braise the legs & thighs. Roast the bird in a 450° oven for about 20 minutes or so. This should get the legs cooked, while leaving the breast-skin crispy. For bigger ducks (or geese), you can let it rest, carve off the breast, then finish roasting the legs in the oven to help tenderize a bit. Blast the breast in a skillet to finish crisping the skin