'conventional path' is correct and can be used in written English.
You can use it to refer to the usual or accepted course of action, for example: He decided to take the conventional path and pursue a college degree.
Here we have to stick to a conventional path.
His son chose a more conventional path, the Foreign Service.
Rammell's early political career took a conventional path and he has built up grass roots experience.
Men can handle that," says Harrison, attempting to convince Jessica to follow the conventional path.
But others, Brown and Whillans included, would find a less conventional path.
Swaggering forthrightness is the conventional path to selling one's story of hood respect to the streets.
It was not a conventional path for a person with Zaidi's scholastic credentials, but he thrived.
Jake Howard did not follow what most would call a conventional path to the law.
The educated classes could not be diverted from their conventional path.
It might if the economy were to follow a conventional path back to full employment.
But if she has deviated from the conventional path, it has not slowed her down.
