User blog comment:Furkan Zomer/Possible Solution - Cursed BBI Weapons and Armor lv.3/@comment-112.205.72.135-20130725182614/@comment-96.48.138.230-20130726044255

That's why he says if it is a low tier item (Shadow, Grave, Sinner), Godsbane to before you purified AND THEN go get an additional level 3 armor before purifying the whole bunch again to see if the most recent level 3 armor you just acquired is the high tier type that you're looking for, instead of resetting the entire pattern by purifying every item and starting with zero level 3 armors to purify which resets your chances at 10% of a high tier level 3 armor.

Guaranteed one in five odds is better than taking your chances on random 1 in 10 odds.