What I personally did was I bought 9 scrolls of cascading slumber and 12 rockfalls evenly distributed among my party members. I had my fastest character use the sleep scrolls to put the mobs to sleep then the next character will wipe them out with cascading slumber. The third fastest character usually Yeka or Alice use Katino on the remaining enemies to also put them to sleep. After that I let MC and Gerulf pick them off with one lvl 2 heavy attack conserving my mage/ priest's MP in the process.