The challenge for the hard-mode oryx is so broken. I've been in five or six groups just this weekend, and in half the groups, we had detonated all the bombs at the appropriate time, and it didn't work. With the last group we did it four or five times. If bungie refuses to fix their game, and still expects us to be able to complete a challenge within it. They need to fix the challenge mode, or I don't understand what they want us to do. Either buff the bomb damage or rebalance the heal on oryx. Without this, players really can't complete bungies impossible challenge mode within the expected credentials.