Yeah two per wing IS overkill. If you have them then go with it bro. You will have really responsive ailerons. This plane and the 41% demand strength on all their flying surfaces. They are large and very responsive. Yes you could go with a slightly less expensive servo but why?

I found out on my 41% even with 5955's I was getting some blow back. This is an area no to cheap out on. It could potentially lead to dangerous situations in flight.