Thanks for confirming there are no hooks in tk-nuke-writenode.
My motivation for wanting to change the path is to remove the extra info added by the node itself to the file names.
For example there needs to be something in the output knob of the node if there is nothing it gives an error. I dont want any extra info and dont want the nodes name in the output because our naming convention does not allow it.
It also add as %V which puts in the tank_task into the file name which I also dont want. I was hoping for a simple way to patch out the extra unwanted parts after the path was generated and a hook seemed like the simplest solution.
What I ended up doing is just making a custom version of tk-nuke-writenode which removes the unwanted parts added to the file name.