Good point, Kakashi cud probably take Mei. But honestly don't u think he has more of a chance to take Tsunade, she is too short range. I also think because Onoki is slow and old, Kakashi can trick him and kamui him and win against him too, Onoki in his prime though wud win. Mei might beat Kakashi though. Anyways the kage I know Kakashi can beat right now is Tsunade becuz of her short ranged combat limitations.
Kakashi is pretty powerful u know, he has everything over Tsunade.
Ninjutsu
Genjutsu
Even Taijutsu (not strength)
Skills
Intelligence
His speed is around there too
Experience
Tsunade only has more chakra
Like I said, I'm not going to explain myself anymore because I've gotten tired of the argument several times before. If I can find some of my evidence later I will copy and paste...I'll just work with your cases right now.
Ninjutsu=equal (despite Kakashi's wide variety, Tsunade has a mastery over the medical arts, which is unparralled with the exception of Kabuto, who I hold as a scientist, rather then a medic. Tsunade's medical prowess and mastery of it makes her supurbly great in ninjutsu. Kakashi's area equals quantity, Tsunade's area equals higher quality, even if just in a specific feild. That's why I hold them both equal in the matter of ninjutsu)
Taijutsu=Tsunade (her experience as a medic has given her way more experience in fending off opponents in taijutsu. Her area is not just power but she has technique in her fighting as well. Her speed isn't up to par with Kakashi's but it's enough to contest. She's vastly stronger and can hold out longer. Tsunade is above Kakashi's tai IMO)
Genjutsu=N/A (Not much of either's prowess in this feild has been shown. Kakashi cast a D-ranked gen on Sakura, his only casting feat. His sharingan I would say gives him some level of immunity but we haven't seen any. Tsukuyomi doesn't count because of the neccessity of being a bloodline Uchiha, besides he never released from it so it wouldn't help his case. Tsunade was shown in a filler to cast one genjutsu. Filler or not, whether it was relivent or not it was still pretty intermedite so that's an unclear factor)
Skill....I say that compliments/reiterates the basics skills of nin, tai and gen we've stated up there
Intelligence=equal (You have to take into account that Tsunade is in fact Hokage, her experience makes her very knowledgable about the shinobi world and shinobi. No doubt she has info on Kakashi. She knows about Madara, she is contributing with her vast knowledge in the war right now. Kakashi is a stratigist, Tsunade isn't an idiot in that area, in fact she's pretty smart. The way she went about the Invasion of Pain. I hold them equal)
Experience=equal (Tsunade's fought on the front lines of the Second Great War for a longer time then Kakashi had in his war. It appeared as if she were in her early 20s when the war began...I'm not going to estimate much here but I'm going to say she has more war experience. Now Kakashi has his Anbu experience and his entier time as a shinobi. Tsunade had her break down and she was out of the line of duty for about...20 years maybe. That takes away from her experience since she probably wasn't in practice...Kakashi's early 30s...Tsunade's mid 50s...I say that evens out to some extent)
The feild is pretty even with those categories you've placed down...however lets wait to whip out her pair first. It looks like we're about to see what she can do...but you have to admit, 4 of the Kage are out on the battle feild right now. What is that saying about the enemy. You have Oonoki and Gaara out there, Mei's with the Daimyo, and Tsunade's about to rejoin the frey...I believe if Kishi throws Tsunade in the battle feild we'll see the extent of her powers and we'll be able to make our determination on who she can or can't fend against, fair enough?