200 flights may be alot depending on how the plane was flown. Blenders, waterfalls, high speed flight or other strenious manuevers could reduce the life of a 3D profile. 4 strokes do beat up on an airframe more than a 2 stroke, and the ys 110 ( my favorite engine) is the king of beating an airframe. keeping the engine tight ( no loose motor mounting screws) the prop balanced and tuned well will help.
if i were going to build the ultimate id go saito 100, or os 90AX 2 stroke.