Limit or remove REV from rotation

[PH77SER]

how about this ridiculously simple fix for everything, well not really but whatever:

heads have a death implant that sends a notice to every head pda and sec that they have died, and an even bigger message if it's removed

this tells heads to watch it in case you just hear ping ping ping all heads except you down but also forces the revs to become creative by making deaths unrelated to them