Thanks for taking me on Nathan-Sama. The Konoha banner looks much better on you, that's where you were when I first met you
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(Shinra Banshō Dōka No Jutsu) - Assimilate All Creation Technique
-In battle, I'd probably used this like Chouji did with that "other" jutsu to become a hardened spinning boulder, but prolly not xD. As far as by itself, it's hard to really think of a good situation to use this other than to pass thru an earthen technique, or to harden part of me, though once you know the higher ranked earth jutsu's it kinda becomes redundant.
-Unfortunately due to earth's weakness to lightning, a simple D ranked release would be enough to stop this, C ranked enough to hurt and B ranked would probably be enough to kill the user. It seems to have more downsides than upsides.
-The advantages are being able to harden particular parts of your body or become fine granular sand, however the obvious disadvantage is against the inevitable lightning jutsu your opponent will surely use.
-Well, if I had learned it earlier on I might have liked it more, but because their are stronger canon Earth techniques that can achieve similar effects with a stronger defense, I'm not really a fan. However if i had a Chouji bio....
(Kao Utsushi no Jutsu) - Face Copy Technique
-I'll be honest, I dont really see a good reason to use this mid battle, perhaps before, perhaps after, but not in the middle.
-I would imagine killing the individual would undo the Henge, reverting them back to their original form.
-Some advantages i would say would be infiltrating an enemy land, or just hiding your own appearance from someone, also the fact it's not permanent makes it good for quick missions without having to change back. I guess the only disadvantage is that you look like someone other than yourself, and you don't gain their abilities.
-Well, It's got it's good points, but I can do this passively and copy them down to their energy signature so I probably wouldn't use it