why not stop both engines so save shock loading the engines.
It won't save a legally mandatory shock load inspection IAW the engine mfgs requirements (unless one is a real cowboy and basically forges the logbooks
).
The vast majority of shock load inspections find no damage but most of the cost is in the whole dismantling + NDT job so the cost saving from shutting down the engine is minimal.
Also most 3B props mandate a scrapping of the hub if 2 or more blades are damaged to an extent requiring removal, and economically you are looking at new prop(s) anyway. So now you have two zero-timed props and if there was no shock load inspection you will have an engine logbook telling a different story, which very few buyers will believe.