I'd fancy my chances in a King Air, so long as I had someone on the radio to vector me to a suitable landing airfield and a King Air pilot to talk through the procedures (e.g. turbine engines) and handling. Then again, I have a PPL and have a limited amount of experience on twins, including a Navajo and a lot of experience in the heavier light singles.
In a jet, I would only have a go if the prospect of disaster was greater if I didn't.
I have 15 hours training in a narrow body sim (some years ago) and recognize that it is a far different challenge.