Stock up on healing items before the fight
Learn Jevil’s attack patterns
Focus on survival first, damage second
Use the Act command to reduce Jevil’s tension when possible
Defend when you cannot safely heal or act
Save stronger heals for later in the fight
Keep your party’s HP above danger range
Use Ralsei to support and heal
Use Susie and Kris to spare or attack as needed
Repeatedly use hypnosis-related actions if available through your strategy
Stay calm during the chaotic attack phases
Memorize the hardest bullet patterns
Keep moving efficiently during dodging sections
Prioritize consistency over risky damage
Use the best armor and weapons you have
Practice the fight if you fail
Choose the route that matches your goal: spare or defeat
If sparing, keep acting until Jevil can be spared
If defeating, keep pressure on while surviving each turn