So according to the weekly update the commendations go away for HoW and you will get 250 rep for each one you turn in.
So I had to grind to get 2500 experience for each level up and I will only get 250 rep per turn in. So it's the equivalent of two maybe three bounties. Wow..don't give us too much Bungie.
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Well I have 18 to burn which I will use to gain rep for crucible