Originally posted by Demonic Phoenix
True, Asuma's strong. I'm thinking he can use Katon jutsus along with his Wind knives.
People tend to underestimate Kurenai as well, since she got the short end of the stick in her only fight.
Remember the ash attack he used against Hidan? He's got that, so katon in confirmed.
And yea, Kurenai had it rough, but that move she did use would be almost impossible for most ninja to break before getting stabbed in the throat. Going by the background material, she's good at both taijutsu and ninjutsu too.
Without hax abilities like those you mentioned, I doubt they'd reach Kakashi's current level in 5 years. Kakashi's supposedly a guy who knows more than 1000 jutsus, which gives him an incredible amount of versatility in addition to his Sharingan & MS. For all we know, he could use all 5 elements because of the Sharingan, though I only remember him using 3.
The only reason he's not well into Kage-level in my book, is due to his relatively mediocre chakra capacity.
Maybe a decade then, but I bet they'd get there eventually.
Asuma's a Sarutobi, so I figure he knows a lot of jutsu we haven't seen too.
As for Kakashi's jutsu, I think that while the sharingan tells him the hand movement of different jutsu, he still has to figure out how to shape each element from base on his own. Sasuke's got the sharingan but has been mentioned as only knowing lightning and fire, so it's not a cheat to extra elements like Rinnegan.
That said, only Kakashi and Mei Temuri have been shown to manipulate three elements without a cheat, so that's uber impressive even with just three.
IMO, Tsunade should probably be at S, while Orochimaru & Jiraiya should be in S+, along with 1-4 Hokages, Nagato, Itachi, Raikage, Bee, Naruto & Sasuke. I agree with the rest.
Tsunade is S normally, but the reason I give her a + as well is the chakra store, which allowed her to cancel the effect of one of the most powerful jutsu we've ever seen, not just against her, but for everyone in the village, thousands of people. And it's just chakra, she could use it for *anything*.
I'd say Nagato is strong enough to be worth considering another rank S++, or Double-SS, or however one would class that. Likely Madara (at full) would be in that level too.