Schrodinger is protected by its pot unless staggered, and physical attacks are ineffective when it is in that state. It can use Cura to heal itself and Lightning must look out for its Icespark attack; if not guarded against, it can kill her in one hit early in the game. Schrodinger uses the Icespark attack usually after recovering from stagger.
The player should aim to stagger Schrodinger with magic, and then attack with physical attacks when it's vulnerable. The player should aim to kill Schrodinger in one stagger as it tends to counterattack with its Icespark attack if it recovers.