anyone in a neck bind can easily rest in it and stay alive for the amount of time and then if they keep doing that, the naras neck bind will just waste its chakra and wont be able to kill. it tkaes a long time to kill some people with neck bind.
you could allow them to use a jutsus (homings will be the only ones hitting most of the time becuase you arent always in the right direction to use a straight attack) and then just buff neck bind, just dont let them rest in it.
You guys are referring this to the Shadow choking jutsu right? (Next time, write down the in-game name of the jutsu not some random english translation)
I need a more specific step-by-step descriptions. If you guys make it seem like its a random "event", then i am not going to even bother going through all the procedure that are linked with that Verb. For example, did the user turn it off manually or their chakra ran out?