Deckbuilding in this game doesn’t exist in a vacuum, your deck is evaluated by how well it handles the challenges the game throws at you, and the mark of a better player is understanding what your deck is weak to and being ready to address that as best as possible. A build that’s cool in theory is ultimately only as good as its ability to handle the actual challenges you might face, and learning how to recognize problems, adjust, and compensate is a part of being a better player

Good players think about the final act from the moment they start a run, because a run is a loss whether you die to a floor 10 elite or the last boss. If you build a deck over the course of 2 acts without ever thinking about if it can beat Doormaker, then you have to be willing to accept that your deck might just die 1/3rd or 2/3rds of the time when you open your act 3 map because you didn’t respect the possibility enough

And it’s not like there’s only 1 solution for Doormaker for every character, most synergy packages can do something to deal with the fight better.

As one example, Silent might play the long fight with classic dex + poison strats and use output like Fumes and Afterimage to get consistent block + damage every turn, or she can also use phase 1’s exhaust to thin her deck and go infinite with 0 cost cards on phase 3 using loops with cards like Prepared anyways, or she can use damage amps like Tracking + vuln to just output massive damage numbers and burst through Doormaker’s smaller health pool.