My question is why you're using Circle Upper for Defense when you should be using Samurai Upper or something better suited for defense. Circle Upper is for attack and stamina purposes, Samurai Upper is heavier and is better suited for attack and defense.
As for your question, you're asking what to use for top-tier defense WDs other than the 2 top-tier defense CWDs. Genius.
You could try using Circle Heavy or something, but you might as well make a Survival combo and use CWD Free Survivor or the 15g Circle Wide from Draciel MS.
"In many ways, the work of a critic is easy. We risk very little, yet enjoy a position over those who offer up their work and their selves to our judgment. We thrive on negative criticism, which is fun to write and to read. But the bitter truth we critics must face, is that in the grand scheme of things, the average piece of junk is probably more meaningful than our criticism designating it so. But there are times when a critic truly risks something, and that is in the discovery and defense of the new. The world is often unkind to new talent, new creations. The new needs friends. Last night, I experienced something new: an extraordinary meal from a singularly unexpected source. To say that both the meal and its maker have challenged my preconceptions about fine cooking is a gross understatement. They have rocked me to my core. In the past, I have made no secret of my disdain for Chef Gusteau's famous motto, "Anyone can cook." But I realize, only now do I truly understand what he meant. Not everyone can become a great artist; but a great artist can come from anywhere."
-Anton Ego/Peter O'Toole (1932-2013)