Know when Silence is coming
The cycle is Shockwave → Apprehension → Call for Help → Total Dismay, with summons skipped when conditions prevent them. Spend a needed SP action before Silence, or preserve a usable item for that window.
Follow the wave and the growing orb
Shockwave travels along the ground toward the party for 8 damage. Apprehension grows a purple orb before firing a party-wide beam for 10. Watch the wave reaching you and the orb becoming a beam, rather than pressing at the start of either animation.
Expect the blackout during the summon
Call for Help darkens the screen and briefly stops the music while a Phobia appears. The blackout is part of the move. Reacquire the battlefield afterward and check the extra enemy before committing to a damage action.