Quick answer
There is no single required build for every run. Start with a role, then choose the equipment and boon that solves that role's next risk.
Three useful starting roles
Safe extractor
Prioritize recovery, defense and a route to the next teleport. This is the strongest learning style because a banked haul teaches more than a lost one.
Deep-run fighter
Use a reliable weapon, spare healing and a positive altar boon before entering a new floor. Treat special rooms as optional tests, not mandatory content.
Merchant builder
Craft enough gear to survive, then spend the remaining materials on shop fixtures and stock. Watch comfort, demand, prestige and decoration effects in purchase history before committing to a layout.
Altar rule
The official description supports altars that can radically change a playstyle, including size changes, Midas-style conversion and manic/depressed combat states. A stronger boon with a downside is a build choice only when its downside is understood; otherwise choose the positive option and bank the run.
How to choose a build
The achievement list tracks kills with swords, axes, hammers and staffs, while the Steam store describes altars that can radically change a playstyle. Pick the weapon you control best, then use the altar effect to reinforce the role you chose.
Image for reference only; it does not depict the specific content covered in this article.
Sources and scope
Source: the official store page for altar-driven build potential and the official achievement list for weapon progression goals.
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