Throwing out a suggestion here. As it is now the title of "glass bomber" doesn't fit, it can take quite a few hits from the more threatening monsters (shadows). The suggestion I would like to throw out is to lower its defences by a third or so. This would result in the same sort of idea the swiftstrike buckler's using. The swift strike buckler offers amazing benefits in the form of a high attack speed increase, but with the price of low defences it can only take 1 hit in tier 2 or 3, making it fit perfectly the title of a glass cannon. Even though the swift strike buckler has arguably the best benefits for a shield you don't see it often and no on labels it as being "OP" as it takes a certain level of skill and determination to master it. Alternatively the chaos set could also dawn just normal protection rather than having both normal and shadow.
Criticism on this suggestion is both fine and desired :)
Well, I was more extreme with my approach, but I follow the same principle: http://forums.spiralknights.com/es/node/73660
The problem of just making it "a bit" more glass instead of "very" glass is that right now is a very OP set. I prefer my extreme approach even if it may sound silly, due to it opening a different gameplay approach. After all, when people craft Chaos Set they expect a true glass cannon... but then they are surprised on their defensive qualities.
Your approach, again, it isn't "wrong", but I think it is "not enough".