You know, speaking of homefield advantage, this should be the current efectiveness of everybody in the fight.

Tsumiki: 8.7/10. Tsumiki is most powerful in the midst of academy city, where he can turn almost anything around him into a soldier or a weapon, but is at a disadvantage against Jack's earth based powers. Fact, dry stone does not conduct electricity.

Rhia: 5.3/10. Tia's power slows her to convert massive amounts of water into ice, but it's not magic. There has to BE water for her to turn into ice, and since it's not raining and she's not in a lake, her available weapons are currently in use as a dome.

Jack: 9.3/10. Earth is everywhere, And can be used fantastically as both a weapon and a shield. He's outnumbered, but thanks to Ria's stubborn pigheadedness, Akuma's rageboner, and Tsumiki's passiveness, they're more likely to fight each other than him.

Akuma: 10/10. Thanks to jack, there's blood EVERYWHERE. Thanks Jack.