Kakashi could have Killed a healthy Kimmimaro pre-timeskip via Raikari. A healthy Kimmimaro is a low level jounin fighter and his bloodline limit gives him high durability and an offense edge. Kakashi would get some dirt on his uniform but he's above Kimmimaro in agility,speed,tatics......Kamui would be the Icing on the cake but he doesn't need that to beat him.Without Kamui Kakashi would be in trouble, if we're talking about a healthy Kimimaro. Back then he easily defeated Naruto & Lee, and if it wasn't for his illness even Gaara, who was FAR beyoned the level of an ordinary Genin back then, would be dead now. But Kamui should decide it.
Kakashi would Raikiri Kimimaro. Kimimaro's bones wouldnt be strong enough to stop it. Kimimaro has great taijutsu, so close range unless its raikiri of some sort would be a bad idea, kakashi can use his fire and earth releases.lol at the kimimarou is slow part lol he will have to warp cuz physical jutsu does not work an hand hand combat idk kimimarou bones makes him unbeatible in that rocklee even said kimimarou does not waste a step in his taijutsu.an we haven't even seen his braken dance at its best.
it looks like someone don't read the manga properlyhe got owned by 2 genins ,of course kakashi would win .