Wny? Because like all assasin builds,
unstopable slaps you into oblivion.
If you do not know what that is, you have not hit the harder part of act 3. All of act 1, and 2 are easy, it's a bad bench mark for build testing. You need to be able to survive the near infinite free stealth abilities, spell nukes, etc. While your enemy
takes 0 damage from multiple attacks, Orin as example can stack 9 per round while one shot killing you every round