I decided to try the Vault of Glass mission the other day. I got out to Venus and in the area, couldn't figure out what to do. The Ghost didn't pipe up and tell me anything like "You'll need people in each of those circles." or something. I'm only surmising this is how the gate is opened because yesterday, while there, I saw 6 players come in and it looked like 2 each went into the combat circles and when the tower was built, it fired a beam and opened the gate.
Is that the only way it can be opened? If so, atleast have the Ghost say something, or make it possible by moving blocks into the other two, or something.
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There's one way to solo the first part (well there's actually two but this ones quicker) you go up to the vault (giant ringed door) and go to the side of it with your sparrow you will see a little gap in the door because of designs flaws ram your sparrow into the little gap and then get off and your inside the vault (and yes the rest of the raid will work I've done it before)