Here is the thing. If your building a Critical Strike character, your goal is 50% Critical Strike in combat with any buffs that increase this. Once you are there, then you don't need to add any more Precise as your way into diminishing returns. At that point, Sharpened is really nice to have.
Enjoy the game, life is what you really want to be worried about.
PakKat "Everything was going well, until I died"
Gary Gravestink "I am glad you died, I needed the help"