I notice that Fireball damage is applied across the the targets in the area (similar to how a Sleep spell is handled). This is not rules as written. Per RAW, the whole damage should be applied to each character in the area (half for the ones who save).
Currently - 8D6 damage (presumably) is rolled. Then the first N0 points are applied to the lowest HP target; then the next N1 points go to the next target; etc.
RAW - 8D6 damage is rolled. The whole damage is applied to each target. If a target saves, only half damage is applied to that target.
