Until Cryptic decide to allow you to bring a full 20 people in of your choosing to an instance(what the hell they were thinking when they created an encounter that requires all 20 people to play intelligently I do not know....), im offering a solution which requires only three people to be co-ordinated while the rest of the cretins get up to their usual tricks. The way to beat the entity?
Scramble sensors.
Keep it scrambled , and the rest is simply a matter of dps and relocating if the games terrible rendering system decides the entity should become invisible due to all the shards.
Two people can just about keep it perma-scrambled. Three are optimum.
Enjoy.
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