Prepare a repeatable build
Boss Rush and Hardcore are version 1.0 challenge options. Enter after you can execute the basic weapon sequence, avoid the common attack patterns, and sustain the build without a rare one-room condition. Consistency matters more when mistakes carry larger costs.
Practice the failure point
Identify whether attempts end through damage, resource exhaustion, poor positioning, or an interaction that stops working. Change one piece and retest. Keep challenge advice tied to the current version because balance and mode rules can invalidate an early launch shortcut.