Magus late window (119 next-to-last)

Frog attack quickly (Crono does nothing)

(wait for Geyser)
Crono crit + Robo MT Frog
hold X: Frog attack
mash A: Crono Slash

(Magus attacks Frog)
Frog attack + Crono Rocketroll
Frog attack + Crono Rocketroll

(wait for Magus Geyser & attack Robo)
Frog attack
Lightning X 3