My Ninjutsu is D-Rank :/
Alright, the first Jutsu is kinda meh. As i mentioned before, it's very rare to get an opponent into the air, but not only that, with this Jutsu, i need 2 more before it to even be able to perform it. 1. Kick into the air > 2. Shadow of the leaf > 3. This Jutsu. So that's basically wasting a whole turn on only C rank Taijutsu that can be easily avoided if the opponent simply uses the C-Rank lightning armor to paralyse me, or the B-Rank Earth armor to block it. So unless the opponent is super inexperienced, i don't see myself ever using this technique.
As for the drunken fist, this indeed seems to be the best C rank Taijutsu there is. I believe this is similar to what Rock Lee used against Kimimaro? Basically the user acts if they were drunk, and not think twice about their moves.
For example, if I'm being targeted with a high kick, this technique could allow my character to "slip", bending his upper body back to avoid falling and at the same time dodge the kick, and raising one of his legs in a derpy way upwards to balance himself, kicking the opponent in the process.
Another way that i can think of: if I'm being targeted by a punch or kick to the stomach, i could bend my upper body forward while also stretching my legs forward, pretending to have taken the strike to the stomach, but in reality the strike doesn't quite reach my stomach, and i could take advantage of that by grabbing the limp that tried to strike me, and subdue the opponent.
That's all i could think of, not sure if the second one is correct :/