The injectors are past the 100K rated life. Even the worst injector will start to fire at some point. Melting a piston when it does fire or scoring the walls from raw diesel is possible. Bad injectors can miss cold. The pump supplies all 8 so it works or doesn't on ALL 8.
Likely you have other issues causing the miss. Pop the oil fill cap and look for a chug of smoke. Then suspect the rocker arm buttons for breaking and dropping a cylinder out from a closed valve. Maybe even a burnt valve.