History of Careful Calculation

Overview

Careful Calculation is a 10-point Salvation's Edge raid challenge triumph for the final encounter, Zenith against The Witness: complete the encounter without any player exceeding 2 stacks of any resonant energy. Which seal it counts toward was not stated in the pages I opened.

How to complete

• Players gain Resonance stacks by standing in the telegraphed attacks of the Witness's arms: Pyramidal from the hand from above, Spherical from the bee attacks and Hexahedron from the beams (yellow Spherical, red Hexahedron, green Pyramidal per PCGamesN). In the normal fight a third stack kills you; this triumph caps everyone at two.
• Each limb player should pick one attack type to handle. Slide into the telegraph and damage the bracelet immediately, ideally with a machine gun, to reveal its colour before picking up stacks. Then take the matching resonance, return to the limb and break the bracelet to earn the Glyphbreaker buff.
• If you moved fast enough to reveal the bracelet without taking stacks, you avoid the debuff entirely. Only collect the resonance needed for a glyph break.
• A player carrying unwanted resonance can cleanse it by standing in the central plate while the buttons on the Witness's coat are being broken. Coordinate so someone breaks a glyph and cleanses regularly.

Notes

Sources agree on the 2-stack cap; the exact cleanse timing comes from one guide, so verify in-game.