At Big Finish, we do keep a timeline of all the dramas to coordinate the writing and continuity - even if the dramas don't make the placement of a story explicit, for the sake of good practice and consistency, it does have a fixed date.
So, with that in mind, the BF placement of The Path of Fate has it beginning in 1985 when Angelique going into hiding, with the main Quentin storyline taking place in 1990. That puts it after the full-cast audio dramas, but before Return to Collinwood.