opinion for my squads after play lvl 8 siege of Manastyr:
Note : i play with all squads lv 10 or higher, almost all squads using good armor and weapon. Normal difficulty
-Jessy : Strong enough to fight at center battlefield but she better running away if she face heavy squad.
-Mage squads Lily, Bristol & Frall : very helpful, especially to kill heavy squad. Players need at least one mage squad otherwise they wil get trouble.
-Worilla, Owen, Wendy, Frall : They are monsters :D
-Fang & Kurohime : without healing potion they need one mage or archer to escort them safe to the chest at right side castle, otherwise they will get withdraw.
-Magdalene : almost like Jessy, she better stay away from heavy squad but still helpful to fight mage squads.
-Ailluin : weaker than Wendy but her skill double shots really helpful.
-Alcena & Lenneth : i think i will not use them for hard battle, for Alcena, her enemy taken 0 damage many times.
-Phyrra : her defense make me worry enough, she better stay away from enemy with counterattack. Use her to fight mages is better choice.
-Mia : use Red Salamander and Ice Alraune make her strong enough. She was able to break through heavy squads defense even just scratch.
And i found enemy archer with counterattack ability near the chest.
I'm satisfied with my squads, even there's still small number squads disappoint me. If talking about enemy, i'm only interested with enemy heavy squad. They're strong enough to make lot of my squads running away. The balance from Battle of Manastyr is good, not easy but not make me frustated.