I've been contemplating spending a bit of time trying to establish %dam from various mobs but I'm missing some info which makes it a bit tough. My thought was, as per other discussions, allow a mob to hit me in armours that offer various types of protection and measure the decay. From the decay, calculate the protection from that armour. But I am having problems determing protection based on a known amount of decay. There is a really good entropedia article http://www.entropedia.info/Page.aspx?page=Armor+Decay that is based on a post in PCF. It explains armour and decay and has formulas to determin decay for a given amount of protection. For example: For armour with durability less than 100000 decay = (0.003 * dmg^1.75 + 0.05 * dmg) * (1 - Dur/100000). But I need to change that into something that reads like: Dmg = ..... But my maths skills have deserted me. Can anyone help?