*Drops slug and get sharks* :|
lol jk
and idk how i missed your reply ~_~
I’m guessing you’re talking about the jutsu in the spoiler when you ask about a defensive technique. So yeah a good technique that would work with that could be a different type of mucus that the slug can spew out or even a signer of the contract (like how for the toad contract the toad signers can spew out oil like toads...I guess I'll make that into a custom z.z) that is sort of a ‘anti-mucus’ that covers the body to protect you from the burning/melting effects of the acid from the jutsu in the spoiler. Or maybe the user can even secrete it from his/her pores (custom idea for me

) which would work better. This mucus can also have slimy properties so that certain physical attacks ‘slip’ pass the body of the signer. Like taijutsu wouldn’t work because the user’s body is too slimy and slippery for a firm grip or landing of a hit. The signer could also use this slime to move around at a faster speed. Who knows maybe that mucus could also have a burning/melting effect too that the signer is immune to.
Another nice way of using it is in team battles, maybe the slug or user can place this mucus on their partner so that when they get near the acid and touch it, it won’t burn them. So while they have this coating of anti-acid slime on, the slug can continuously spew out acid at their signer’s opponents from long range and the signer and his/her partner won’t need to worry because with the coating on their body they won’t get burn ;o
Question though; Are signers of the slug contract immune to the acid from the ‘Tongue Tooth Sticky Acid’ technique? I know the slugs are immune to their own acid too right?
Now for your next question, I think the technique shouldn’t only be offensive. In my opinion it can be defensive and supplementary. Hear me out. You can use it when you’re trap in a corner (not literally) by some fortress summon around you by the opponent. A perfect example would be that nasty bone forest that the kaguyas can summon around the battlefield. With the acid, Katsuya can spew out a vast amount to burn down those bones and clear the path for the user to walk through. (which is why i need to make the user be able to spew i out too z.z you should make that for a cannon jutsu ;3 )
Now a dangerous offensive way to use it is you can have one of the small clones in your clothers, like near your chest or your collar sleeve hidden from view. When you enter short range, have the slug spit out acid (although B rank in power, it’s still dangerous) in their face or wherever while you the user does something else. It won’t take long since the summon just have to inhale and exhale it out.