I think this is a .60 size plane. If so.....standard servos all around except for rudder. Use a HS 77BB on a pull pull. This is a profile servo...so is light and won't add much weight. If I'm not mistaken....the elevators work on one servo with push rod and yoke.
Hmmmm....that would make it 5 servos. Adding two servos for elevator will add weight to the tail. YOu may have a CG problem with this size plane and have to add too much nose weight.

Hope this helps.