it doesn't have Special Moves or AoE
Tested in underworld many times. Went today with each to get numbers.
Goo damage seems to have a 4x4 area and it chooses 1 or 2 victims in the area and does 30 to 42 damage to those slugs. Does 60+ damage to slimes. The amount of 4 x 4 areas varies with each attack and they generate over a period of time.
The other two do damage to each individual target in a large area at the same time:
Earth has the same huge area as Goo. Does 8 damage to each slug 10 to each slime.
Energy has a smaller area (just the slug room) 8 damage to each slug 10 to each slime.
Thats why we chose Goo from the beginning. More damage to the individual caught in the damage area.
They may do the same damage overall but if you have a full 10 x 10 area Goo does more damage to fewer targets.
But in a 10 x 10 area you never have 100 targets in that area so Goo ends up doing more damage overall.
The damage is not based on how many targets are in the area. So if one target is in the Goo area it gets 35 damage. If one target is in the others area they get 8 damage.