Sentry Build

[Yoshimiko]

I've been messing with the calculator and just wanted to see what people thought of this build:
http://us.battle.net/d3/en/calculato...WjR!SUg!bYYZcc

I don't really think Grenades or Chakram are necessary, but I didn't really know what to put in its place. Chakram would be used for Groups, after sentries are down to spend hatred, bola shot to generate Discipline, Strafe for bosses.

What would you suggest for replacing Grenades&Chakram?

Edit: Maybe something like this? http://us.battle.net/d3/en/calculato...WjR!SUg!baaZcc