I did 3 full loops 1-50, that's 150 floors. Have weapon and armor at +26. So to complete I need 8 more silver chests in 41-50 range because they always fail in 1-40 at this point, and I highly doubt I'll see 8 successful chests in a single 4th run.
Is that supposed to be 5-6 full loops (250-300 floors) just for 1 weapon, or I'm just unlucky?