This topic....Limp or Ditch....has been done to death before. The Consensus was "Ditch" anytime you have more than a simple single indication such as a Chip Light.
The original mindset was a gearbox would give you some warning .....but as it has been proven that is not always the case....then a controlled ditching is far safer than experiencing a Catastrophic failure while in any stage of flight at any altitude or airspeed combination.