Originally Posted by
Ryllharu
Why be on the drugs? He knows all the advantages of Yoki (as Clare has explained during her travels with him), and all the disadvantages of being on the pills. The pills make the Claymores dramatically weaker (learned the first time Clare was in the Holy City during her battle).
Perhaps his armor has all the various plates on it to not only maintain full mobility, while redirecting most of the force of attacks away from him. The yoma's fingers glanced off his bracers, and the shoulder plates look like they are the same. But Claymore armor is still just regular light plate, Clare has broken hers how many times, and usually just gets a replacement from her handler.
I think if anything, Raki's Greatsword is heavier than a Claymore's blade. Miria and others were just commenting that their blades seem to be of a material that never requires sharpening, and is far lighter than it should be. Unless Isely knows how to obtain that material, I'd wager it is far more like Guts' Dragonslayer from Berserk, but not quite as awesomely/ridiculously huge.