Forge calculator
Up to four ore types, at least three ores. Shows the average multiplier and how strong each trait is at that ore's share of the forge.
At least 3 ores in total.
Formula: the wiki calculator's shareScaling (nothing below a 10% share, linear to the full trait at 30%, capped) and an amount-weighted average multiplier. Value formulas and rarity multipliers are not on the wiki and are not applied.