I find the points in time I need to use Night/Troub are pretty far inbetween eachother, so the recast doesn't effect me much. I went with what you have there for Group 2.

And yes, Dirge and Sirvente do actually help quite a bit.

As for group 1, I went for Lullaby and Finale 5/5. I just hate when enemies spam enhancement abilities. Haha.