I would not change the flap setting at all. I would use the maximum flap setting authorized by the manufacturer/FAA all the time.
flying for years using full flaps for landing and now , for the first time in years you use less flaps...you're doing something not routine...and you are more likely to screw it up.
as to assymetric thrust...if you don't have it in your bag of tricks woe to you if you are in a sioux city situation or a rudder hardover and out of options, or otherwise faced with something unusual
IMO being competent at landing with any of the recommended landing flaps for your aircraft type should be extremely routine! In my bag of tricks I'd much rather have the ability and confidence of landing with any of the landing flaps than being proficient at using asymmetric thrust! What if you can't select maximum flaps for whatever reason?