Very much appreciated, Mousferatu, thank you. It's a very valid point and I hadn't really considered the fact that fighting them all could turn into a real slog with the only variations being their CR's and tactics after awhile. Thanks for the input, exactly the kind of thing I'm looking for here. Will rethink that.
You could just see how it turns out in play? I find APs work best as frames where you let the players change things up, and react to that.