They instead made the situation as perfect for Leo and Nyda as possible. To ensure none of their power would be wasted, the Jas and Liv practically corralled the enemies together. The push their construct did grouped the enemy vanguard and middle guard together.
Lilly on the other hand not only helped in gathering the enemy, but she doused everything in water. Water was not natural conductor but it made electricity better. That simply meant being electrocuted with or without water made a huge difference. Naturally the former was worse.
When people get wet, the water on their skin or clothing conducted electricity more effectively than dry skin. In the same vein wet skin allows electric current to flow more easily through one's body, which increases the intensity of the shock you experience.