********!!!!!!!!SPOILERS!!!!!!!!!!!*************
So you made it this far, time for some back to back boss battles. Kleoneo can instantly kill a character and he hits very hard besides. I used Kruller's heaven blow for healing until Kleoneo starts to fly, then I switched Zellini to healer using potions. If things get hectic, ameliorate with ALina. Make sure your hp/mp are at decent levels towards the end of the fight because there is another boss fight right after this. He has about 12-15k health, so judge accordingly .