Board Thread:Theories and Speculation/@comment-26379028-20150606210145/@comment-5936871-20150607172219

A (Third Raikage): This dude had massive reserves of chakra, endurance, and fought toe-to-toe with Gyuki, the second strongest Tailed Beast, and the only real injury he sustained from that fight was falling on top of his own hand and impaling himself by accident. He later fought an army of 10,000 shinobi for three days and nights in order to protect his comrades to let them get away and he only died in the very end after those three days passed. Even though he was reanimated, that doesn't make you any stronger than you were when you were alive, if anything, you're weaker, and all it does is give you constantly replenishing chakra and you can heal from all attacks excluding TSBs. Anyway, he was able to withstand being hit by Naruto's Wind Release: Rasenhshuriken while he was in NTCM and only sustained minor damage and his LRCM was neutralized at the time. So I think that makes it pretty clear how durable he is. He was also capable of dodging Naruto's Rasenshuriken twice, once when partially blinded by the Sun, and the other when attacked from behind, which is an example of his speed. The dude was a beast who's strongest technique was known as the "strongest spear" which could cut off all of Gyuki's tails in rapid succession and his body was known as the "strongest shield" due to him being so insanely durable and resilient to everything. Also, he was also known to use black lightning as well and taught Darui how to use it, which is more powerful than regular lightning. Overall, he was hailed as one of the strongest shinobi in history and was the greatest Raikage Kumogakure ever had.

Tobirama: This guy was capable of surviving a battle against the Gold and Silver Brothers, landed a fatal blow on Izuna Uchiha, Madara's equal at the time, and created the Shadow Clone Technique, Flying Thunder God Technique, and Summoning: Impure World Reincarnation AKA Edo Tensei. He was also a master of Water Release, and could use the other basic natures as well. He was fast enough to plant a seal on a mindless TTJ Obito without him noticing, and return one of TTJ Obito's TSBs back to him and hit him with it quickly. Also, he was a skilled sensor, had kenjutsu skills, and was able to use high level genjutsu that could smother his opponent's in darkness so that they couldn't see. Overall, he was one of the strongest and fastest shinobi during his era.

End Result: Although it would be a good battle, I believe that A would win. Why? Cause as far as we've seen Tobirama doesn't have anything in his arsenal that can compete with A's body. A is just far too durable and resilient, and we don't know how good Tobirama was with wind release and regardless if Naruto's Rasenshuriken couldn't hurt him, then Tobirama definitely doesn't have any wind release techniques that can. Although Tobirama may be able to keep up with him in the speed department and keep him at bay, eventually he would get tired and be unable to defend himself against A who has much more chakra and stamina than he does on top of a very durable body. I don't see how Tobirama would be able to harm him, except for using the same tactic that a Sage Mode Naruto used and make him fall down on his own attack and impale himself. Other than that, I don't see Tobirama winning, but he still has a chance.