The hardest challenge in the game should NOT be able to be completed in 45 seconds. That's why they removed solar burn and burns in general. For once, I agree with Bungie. I ran it legit a few weeks ago for the first time and I must say I had a very strong sense of achievement upon completion. Yes it's difficult. Yes it's time consuming. That doesn't mean it's not doable. Find a good team, coordinate with them, communicate with them, and be patient. You can't rush the fight. I suggest looking up guides on how to balance Skolas's health and the enemies. It really helped my group. Good luck!