Caporegime
Crikey
Guess you don't a lot though so don't want the downtime of waiting for replacement's
My typical set up with flash is 2 off camera, 1 on camera. I have 2 bodies so generally I have 1 flash on each so I need 4.
A couple of years ago I had 2 weddings back to back, after the 1st wedding 2 flashes died, somehow. But because I had 5 flashes I was able to still do it with 2 off camera and 1 on camera. I just need to keep moving the flash heads between the bodies that's all.