There were a few severe causalities from the Rifle Mages to the point they were near the death's doorstep. However, a lot of the Rifle Mages had prioritised the rescuing of these Rifle Mages for the Pandarian Medics that were in the Bamboo Fortress. They were under strict orders to survive and no one was supposed to die.
If one were to incur injuries to save another, they were so called 'programmed' to do so. This was because as long as they did not die, Jin was able to save them in some way or another. With the power of improvised smithing, their King was able to create prosthetics at an alarming rate which were not only useful but it felt natural enough that they felt they had their hands back too.