>trusting aeria translations
Maybe YOU should get it right. I have magic sundering +30 and I tested it. You only get 4% flat crit % per piece, the translations are wrong. The rest are just % increase on the crit value, which are good if you are extremely undergeared but still not worth since the crit damage cap increase from them is barely noticeable. Pre-awakening you don't need that much crit chance and post-awakening you'd be better off with Abyss Roar set (20% crit against bosses) or Forest Wound set.