Screw the Rasengan.
Giving a guy that can form multiple expendable copies of himself a primary attack that requires:
A: He stand still to gather it until her perfects his chakra control
B: He do it himself instead of via clone
Is almost criminally stupid.
Crap, even just having his clones soak themselves in alcohol and kamikaze with a book of matches in hand is more effective than the rasengan.
(probably rather uncomfortable to remember a few hundred times, but still.)
All he needs is ONE decent area effect buff or force multiplier and he immediately becomes strong enough to survive in the near-term.
That gives you the time you need to break his other bad qualities down and build him back up.
Give him some kind of ranged attack that his clones can spam as well as he can, or some other way to leverage the duplication effect.
THEN you can fix his taijutsu, background education and tactics, etc.
As for Sakura, you start working on her conditioning and practical skills.
For Sasuke, you stuff him in a bag, tie it shut, and then throw it in the river and call it chakra training.
I kid, but seroiusly short of therapy-no-jutsu fixing his major character flaws, maybe give him anti-genjutsu and blind-fighting training.
Something he really needs and can see how useful it is even with his massive tunnel vision on Itachi.
Bonus points if you can get him to the point where he can no-sell some random sacrificial bandit/cannon fodder that attacks him from behind.
Easy validation for your teaching efforts in his eyes, and its just about the only thing he can actually learn at his level that MIGHT be useful against Itachi.
Maybe he will hang around the village long enough that he can start on the good stuff.
Giving a guy that can form multiple expendable copies of himself a primary attack that requires:
A: He stand still to gather it until her perfects his chakra control
B: He do it himself instead of via clone
Is almost criminally stupid.
Crap, even just having his clones soak themselves in alcohol and kamikaze with a book of matches in hand is more effective than the rasengan.
(probably rather uncomfortable to remember a few hundred times, but still.)
All he needs is ONE decent area effect buff or force multiplier and he immediately becomes strong enough to survive in the near-term.
That gives you the time you need to break his other bad qualities down and build him back up.
Give him some kind of ranged attack that his clones can spam as well as he can, or some other way to leverage the duplication effect.
THEN you can fix his taijutsu, background education and tactics, etc.
As for Sakura, you start working on her conditioning and practical skills.
For Sasuke, you stuff him in a bag, tie it shut, and then throw it in the river and call it chakra training.
I kid, but seroiusly short of therapy-no-jutsu fixing his major character flaws, maybe give him anti-genjutsu and blind-fighting training.
Something he really needs and can see how useful it is even with his massive tunnel vision on Itachi.
Bonus points if you can get him to the point where he can no-sell some random sacrificial bandit/cannon fodder that attacks him from behind.
Easy validation for your teaching efforts in his eyes, and its just about the only thing he can actually learn at his level that MIGHT be useful against Itachi.
Maybe he will hang around the village long enough that he can start on the good stuff.