Cosmina isn't much of a factor in either round, lucky if she can fire off one sonic blast before being taken out. Yuu is the biggest factor for team 1. I can see Marcy being able to beat Ash or Martha individually, but not Haven when he is able to keep out of her reach. I would give it to team 1 7/10 times.
Round 2 is where things get interesting. Yuu's fire is able to burn through Cadence's plants, but Cadence is still extremely smart. She could dispatch Marcy and Cosmina without even getting close to them. So with their combined strength, I will give it to the hate dolls 7/10 times.
Main character battle Royale! Haruko(gem) vs Huntsman vs Chase(normal) vs Gen(pre Cave) vs Arthur(no time powers) vs Count vs Crow vs Fumi vs Derek.
Giving it to Chase! Chase and Arthur are the standouts as most powerful, likely to outlast the others without extreme difficulty. And once they're the only ones left, Chase wins with his flames. Arthur is weak to heat and flames and Chase can create them while regenerating past Arthur's attacks. This matchup ends with Arthur in ashes and Chase on top.
Chase vs. Ikari! Death to win, apocalyptic city street covered in cars.
I think the round one is a clear win for the Hunters
Round 2 might start with Masako taking the lead, but sooner or later he is going to start running dry, specially when you consider that none of the characters he is facing can be bitten (Eve) or carry any natural born powers. Masako would only have his baseline powers that, even as impressive as they are, would fall short against an experiencied trio as Eve, Alex and Garo.
Iris is a non factor. She won't have time to make a doll to defend herself before she's wrecked by the other two. As for the other two, it depends on the arena. If Marika is forced to fight head on, Haruko wins. If Marika has darkness to hide in and set traps, she can get Haruko poisoned or stuck to a wall and kill her.
Honestly, I think this fight could go either way for the first round with a slight advantage to Iris, and with round 2 a slight advantage to Garo due to the increase distance. Overall, I would think Iris will end up winning more times than Garo, but just by the smallest of margins.
Gem girls (Haruko, Ariana, Loveline, and Kusuri Inoue) vs The Scared Beasts Hunters (Eve, Alex, Garo, and Falken)
I give it to the Sacred Beast Hunters. They've worked together more times, and they have a clear and competent leader, while the Gem Girls have only been together once and have no leader. They also have vastly more cumulative experience and three of the four have extremely effective long range attacks to deal with the girls if they decide to fly.
I see round 1 being a tossup, with Masako winning most of the times. While he can't get soul powers from Chasen's genetic code, Masako can still put up a huge fight. Round 2 is going to Chase 100% of the time though, no question.
Amelia and Alexis run the doll gauntlet! The team moves onto the next wave, regardless of result and are fully healed. Win via death or KO.
Wave 1: Cosmina, Marcy and Cassandra Wave 2: Haven, Martha, Ash and Patches Wave 3: Cadence(with medal) and Yuu
Special wave: All dolls one after the other in this order; Jane, Cosmina, Marcy, Cassandra, Ash, Haven, Patches, Martha, Cadence(with medal), Yuu.
Special wave 2: All dolls listed above at once.
Round 1: In character for Amelia and Alexis Round 2: Enraged Amelia and Alexis
Wave one: No chance for the dolls in either round. Cassandra won't even get close enough to stab them. Cosmina might get a shot off, but those two should be able to handle it and even if not, enough heat will mess up the travel of sound waves. Marceline would be too afraid of flames to even join in.
Wave two: Giving this to the dolls for round one. With Haven making barriers, Martha fighting up close, Ash snuffing fire by making it too cold to run, and Patches throwing around stuff like the ogre arm and spring fist, Amelia and Alexis could be pinned down pretty quickly. Round two is trickier. They will throw around more power but also expend themselves quicker. However, their greater ability to keep fighting while injured could carry them to victory, creating too much flame for Haven and Ash to stop.
Wave three: No chance to get through either round. Round one they do easily make it up to at least Cadence, because one on one those dolls are easy. But Cadence has Industrial Poison, not only more of a physical powerhouse but capable of making toxic clouds, of the sort that should snuff a flame. I do still give them 6/10 against her, but then there's Yuu. Weakened from Cadence and probably a little those before her, they will be stomped. They will attempt to use fire, which has devastated every previous doll, only to find her getting supercharged beyond their capabilities. They'll be diced. This only gets worse in berserk states. The flames they will blast Yuu with will be stronger, raising Yuu's power level even more sharply. She'll blaze so hot her sword might melt in their bodies. Cadence would probably be easier that round though.
Aria (Iris) vs. Callis vs. George, Callis has old swords, KO or death.
Giving it to Sid 8/10. He doesn't have a nostalgic weak spot to strike at for Ron, and his own medal gives him aerial mobility, which would otherwise be Ron's big advantage. Ron probably still has more, but he doesn't have nearly the attack power Sid has. The terrain is good, giving Ron lots of room to move, but that will only get him so far facing another speedy opponent. Ron will be split open by Sid's impact fueled kicks.
Marceline vs. Pitch. KO or incapacitation to win. Abandoned house, pool in back.
Interesting matchup. I would go with Marceline, since she will get stronger over time, and if her fight with Dan proves anything, is that she will be able to last long enough against Pitch to be able to land a few shots while she's powered up from all the damage that Pitch hit her with.
Alexander (waybig) vs Marika. Rules, Marika doesn't have dolls to help her. KO or incapacitation to win. And lets have them fighting in a fancy mansion with plenty of rooms and they start in different locations of the mansion.