3 engines
Going back a page, I have seen 3 engine ferries and have stayed on task after an engine failure (more than once). But we also used to stay on task after a lightning strike so long as the airborne compass swing against the IN was OK, my record was 6 strikes in one flight without leaving (although these were far north strikes, not tropical strikes).
This may seem cavalier to the younger guys but I am still happy we were safe and I did attract flak for not taking aircraft when others did.
I always felt happy that if you cut every piece of electric string in the beast it would still fly quite happily.
MM