Ultimately, the water was a huge hindrance, but Shin knew mud style, and was not so easily countered. His entire body morphed into the stuff, and became a muddy substance. His great, grand armor, turned to mush, and began to slowly recede, as he left it. It didn't completely disintegrate though, turning into a new muddy, hill, a blemish on the forest now.
This storm was a blessing. It was like a constant surge of power. Nature itself was flowing through Machi, as she darted through the forest. Her lightning cloak was stinging, like usual, but it wasn't as bad, the natural lightning was nicer to her, instead of pulling, always tugging on her own chakra reserves. She moved like the lightning itself, using the rain as a way of conducting herself through the area.
Rikuto was having trouble fending her off. She could tell. He was having trouble keeping up with her now. Finally, she had the upperhand. However, she knew, she would not be able to defeat him alone. His body had a protective 'armor' just as Shin's did, except his was invisible. It was an armor that completely negated Chakra. It would require more power than she could provide to bust through. The power of all of her team at once. Meanwhile, she would make Rikuto weary. She would work him to the bone so to speak. So her onslaught went on, with a few clones wearing Lightning Cloaks at the same time. Once Shin was down, their entire team would focus Rikuto. However, Shin was not going without a fight, by the looks of it.
"Muddy Style: Cascade!" Shin groaned, his arms turning into a massive mudslide, engulfing Yasei's clones in the substance, and rolling towards Yasei and Shizuka. The water no longer was affecting him. He had adapted to the environment now.