The waiting game isn't going to last long with the Trolls present, angering the Ogres, so Cain leads the center group of transfers into battle.
All the support classes are in the middle of the group, with The Vala twins on the left, and Slayer plus his rogues on the right.
Both copies of Nemu are singing songs of war, increasing damage done, while they play spells to increase attack speed and damage. The sight of this central group, singing as they go into battle is helping the defenders morale, and the Phalanx of Ogres is seemingly much more disorganized than before.
The first wave of attacks from the Lamia Scourge Casters Cain is using as Lesser Golems cuts into the feet and faces of the shield wall, anywhere they can find a potential gap. It's enough to weaken their balance before the buffed up Trolls smash into the Phalanx and the defenses crumble.