Alright Community46. I'm finally up to help you on this one. I'm posting from my phone tho, so I can't post manga scans. :/
Anyway, Preta Path isn't absorbing his Raiton no Yoroi unless he makes physical contact, both that's common sense. The thing is, when Gakido was on the Konoha Infirmary or whatever, he was thing something to Chikushodo's body. Kiba and his mom entered the took and intercepted his operation. It was then announced that he is extremely weak to Taijutsu. Ei Nintaijutsu is far superior to Kiba's and his Mom's put together. He had to move the previous Chikushodo's body in the way to take the hit for him. So, Ei's Nintaijutsu will easily destroy Gakido. Raigaa Bomu isn't even needed.
Tendo is a key factor hear, but the Chibaku Tensei will kill the other paths as well, including himself. Note that how he had to hide from it via tree several kilometers away. Him sending it several meters into the air would also trap him in his own jutsu.
Bansho Ten'in would work on him. Take note that every time he used the Bansho Ten'in, he's targeted the victim via eye sight. So it can be implied that he needs to see his target before using the Bansho Ten'in. The Shinra Tensei won't connect with him if he uses his Shunshin at the same time as his Raiton no Yoroi. No matter how many sets of eyes he has, it won't matter if he loses sight of him. Tendo loses sight of him = other paths losing sight of him. Ei got behind Sasuke without Sasuke reacting or even noticing that he had moved. He moved so fast that he even left an after image.
C46 is right. Chikushodo is too slow to react to Ei, even with Six Fields of Vision. And, to do a Kuchiyose no Jutsu, she has to form five hands seals and touch the ground. Ei will Erubou or Rariatto her way before then in v2, maybe even in v1.
Shurado is again, too slow, but faster than Chikushodo. He'd have to v2 Raigaa Bomu or Raitoningu Sutoreito him. Jigokudo and Ningendo are fodder to him. A simple Erubou to reach of them is enough. Or one of my personal favorites, the Girochin Doroppu. I'm not worried about the King of Hell grabbing him with a slow tongue.
Pein cannot deal with the Raikage so simply. A lot think the Raikage is a child compared to him. Sage Naruto (just became a Sage) destroyed 5 out of 6 before going into Bijuu form. Those who think that Raikage, who is faster, stronger, more battle experience and Naruto said would kill him (in KCM), would lose to Pein are crazy. -sigh-