At sylrr, I like your adaptation. The best thing you can do is understand the merits of every unit and make the best choice given your circumstances from Shrine. I'm just having a little trouble on the understanding the units part myself. About the Archer EX map, do you not have Leeanne and Bernard available? I have multiple Leeanne from map completion and one Bernard but it's possible he came from Shrine early on and I didn't realize. I see you mentioned Bernice also so I'm not sure how you lack a second tank. Here's the guide I used, base units.
https://www.youtube.com/watch?v=7CiEjozeUzU A lot are reduced and prob max aff as well but the deployments weren't so tight that I couldn't just adapt to the units I did have.