You two have pretty much solved it I think. Breaking the loop Dirk is trying to set up seems to be exactly what the other characters are going for in order to defeat him. I didn't consider Ly'lac's role before, though. It'd certainly be pretty interesting.

Maybe her arc will have to do with her letting go of the old things she has that hold her down, creating a parallel to the story being about moving on from canon. But idk it's 3 AM I might be spewing nonsense here.