>>715481870
>>715481446
I double-checked. I was actually at 70-80 speed. Monoco and Lune at 99 speed. I had them for support and healing only. Speed is very important against him, but too much of it isn't giving many benefits either. He should not get more than two attacks in a row, so he can't erase one of you party members. Usually if he kills someone, and one of party members is at 100% health, he will first drop that member to 1hp, and only then if he's got another turn, he will erase dead member. That allowed me to play long battles against him and learn his patterns, which were extremely hard for me. My whole build, until the end was surviving as long as possible to learn him. Once I learned his 2nd stage, it became easier.

Greater slow on him, haste, buffs that decrease his and increase party damage were vital for me.