It is possible to skip certain fights with ESP

https://twitter.com/Demolition1414/status/981872870170157056

We're currently testing to see what fights are skippable or not

Document listing fight skips in Guest Stars with NESP by Etykalu

https://docs.google.com/document/d/1osSae09rTRoo6CDXA8-eJMj-KNpKVqBhwnIZ1Ylnwk4/edit

Important to note: This has been patched as of 4.0.0