Use Urpina's delay attack plenty to backlog the enemy and your other party members should learn certain stat boost attacks (attack up) and certain attacks that can paralyse or stun enemies, it's basically you've got to keep attacking until these skills get learned then things get slightly easier. I found things really hard until I used the sorcerer who casts decent attack magic. I'd recommend to changing to the formation that involves the cross shape and planting Urpina in the middle so she's protected by the other party members. Mondo is good at doing a sweep attack of all of the enemies, his later skill is powerful. Unity attacks are great too and can turn the tide of the battle big time (chaining them is even better). Try your best and persevere, it's worth it, game gets really satisfying to play when you start to get better and gain more abilities.
