Are you asking what the MEL says, or are you asking for a sensibly cautionary, judgement call, style decision after the MEL says go?
If the MEL says go, it'd better have a few provisos that will include terrain hight, fuel quantities and things to consider should the other side go for a dump.
Anyway, that's where your answer is, if that'll do.... ETOPS, I'd think it's an about face, back to the gate.
In any case, don't push the throttles to the go band before at least finding out what the book says.
If someone tells you otherwise, contrasting what the book says, quit and find a safer employer.