Prophecy

Heaven/Hell

Get Motes -> Open door
Light Motes -> Stand in light to get them
Dark Motes -> Stand in dark to get them
Knight -> ~3 Motes

Phalanx Echo

Get Motes -> Change Room x4 -> DPS to the boss
Don't get overwhelmed by the adds

Wasteland

Find 3 areas with blights to destroy

Yellow Sand with some structure -> Secret Chest

Hexahedron

When you start the encounter, immediately look up at the walls of the room. One of the pillars will have a Toland orb floating above it on the respective wall. You need to cleanse the pillar that has a Toland orb. If a Toland orb is on the northern wall, cleanse the north pillar, et cetera. Rarely, you'll enter a room that has a Toland orb floating on the ceiling. In these instances, you can cleanse whichever pillar is most convenient.
Source

Wasteland - Follow Echo

Follow the Kell Echo

Singularity - Rainbow Road

Go through rainbow road and don't die.

You can find this chest in the final floating diamond structure to the left of the gravity lift. To reach the structure, hop onto the road after you complete the first platforming section. When you enter the diamond, hop off your Sparrow. Run to the bottom right corner of the room to find a hole. Drop down the hole, then follow the path to reach the chest.
Source

Kell Echo

(Motes -> Plate -> Spawn Kill Ogre) x3 -> DPS -> Be close to the boss and don't get shot by the thing and destroy the snipers -> DPS