Combine Razor's Q with Elemental Canopy to shrug off those pesky Electro Fatui while you fight the Cryo Fatui.
Rather than waiting for the Ruin Hunter's Eye to glow (or reveal its core), you can reach for its eye area with Keqing's Teleport or climb with GEO MC's E skill then melee attack it, FORCING it to immediately reveal its glowing eye.
When Noelle has to go hunt again to make those Sweet Sweet Madames. (Warning: Timmie might not like this)