User blog comment:NightcoreRayRay/A Player's Total HP/@comment-35120675-20180525013820/@comment-32180923-20180525162914

That is partially how I figured this out.

I recently found out that all armors have a 40% increase in defense at max, regardless of rarity. I'm not sure if the devs intended to do this or it is just a mistake on their part. Unfortunately, it messes with the defense of all rare armors and legendary armors. I tried to make an attempt to put in the true max defense of all armors, but it appears you and others have undone my edits. I understand that was justified, as I had no proof provided. What proof I have is what I have to ask my friend for. I only have the numeral statistics of the real defense of max rare and legendary armors, simply by multiplying their base defense by 1.4. Because of this, situations like +15 Necromancer Cloak being stronger than +10 Desert Shroud are unfortunately false. I will provide you proof of this as soon as possible. In addition, the game displays the wrong defense, as it isn't scripted to show the true value of the defense of an upgraded rare or legendary armor. It's unfortunate, but LilSP_y will make an attempt to contact a dev (Slevin) to fix it as soon as he can.