I think there are some dodgy decisions coming up here! Read your checklist! 'Land at nearest suitable airfield' is there for a reason. A twin on one and heavy- you are thrashing your remaining engine. Any runway you took off from, you can land on. If, for some reason, you can't, then you go to the next nearest. I would not be happy to blithely set off to a runway 50 miles away on one engine. Not that many aeroplanes have jettison systems anyway, and they are indeed slow. Far more important to get people back on the ground, overweight as required.