Iron Juggernaut only requires 200k dps per person to down assuming only 15 people are doing DPS, much more managable if you are running 17+ dps obviously.
People that believe that legendary cloak is required is just telling them-self a massive lie. Is your raiding group avging 560ish ilvl? Yes, legendary cloak is going to be close to, if not a requirement. But as soon as you start pushing 570+ as a guild, its just icing on the cake (this can easily be reached by killing the first 5-10 bosses in SoO-H for a few weeks without the need of legendary cloaks).
The legendary cloak at this point is just a scapegoat for guilds to not face the facts and get rid of bad raiders that are holding the progression back. If you can't clear SoO at this point after all the nurf's and ilvls pushing 575+.... it has nothing to do with the cloak. Find the players holding you back and replace them. Peroid.
Allot of you are making it out like the cloak gives you +200k dps. It doesn't. You are literally talking 5-10% (~maybe~ a tiny bit more if rng is in your favor).This small margin could just as easily be made up by getting another upgrade or 2 from SoO-H.