Track the Vex data stream to the culster of confluxes.
- Turn toward the large Tower found in the Cistern, you are going to want to climb up into it.
- Make your way up the stairs on the side.
- At the top of the stairs is an opening.
- Use that to get inside.
- Follow the hallway.
- Drop down into the pit and into the Well of Flame.
- At the bottom, go through the portal.
- Once through, continue forward.
- Drop over the ledge, and follow the radiolarian fluid downward.
- There is a troop of Cabal below you that you will need to fight through.