Epilogue 27 it's a beast on it's own there is no magic bullet for it, there is no room to force anything, there are a few general heuristics I follow regarding early exploration and deck building before the second fight, but it's very map dependent and you might be doing them already since they are simple, I've got a playlist of about 41 runs there should be several combinations for each pair:

https://www.youtube.com/playlist?list=PLkN7TwfjiJ1XMn0pgjT0xlQVyVCn-_ha1

This is a run from a month ago after a long hiatus from playing Epilogue 27:

https://youtu.be/6MUYOItSuVM?si=2NrNmCcJc7oHYlFd

In most of them I try to explain my thought process commentary is more useful in chapter 1, by far my favorite on this difficulty

If you interested you can go to the game's official Discord and ask under the strategy channel, I'm usually there with a couple of buddies that love the game, would be nice to see a "newish" (getting to 27 takes a bit of time) player in action, that way we can see your play-style and adjust the advice to it.