I’m running Tales and Darkening concurrently. I started off with Don’t Leave the Path (linear, of course, but useful for learning system and setting). I’ll be going back to the Gibbet King elements of Tales, but I’ve used Darkening to introduce Mogdred, and the PCs chosen quest to reclaim the Dwarf road gives me a seed to build from (and importantly they wanted to do that), so I’ve used seeds from later in Darkening to build it.