An uncontrolled fire (engine shut down, two extinguishers used) means you can rip up the rule book. You now fly to save life. Given an ILS I’d make sure ATC know I’ll be landing no matter what. You’d prepare the cabin for a rough landing and plan for an evacuation after stopping. But I’d be a little more reluctant to fly an aircraft into the ground from a non-precision approach. The less accurate lateral and vertical guidance mean that a tarmac arrival is not guaranteed. But which is the bigger threat, spinning into the ground with one wing off or crashing on an airfield? And even though you might not live, you also owe those on the ground a duty of care. So what do you have to fly over to get to your airfield?
PM