I showed the video to a few DRG friends and they agree that the magic defence needs to be buffed. However, they've also mentioned that the video doesn't show the actual buff list of that DRG so we were kind of skeptical about it because of the way the game arranges your buffs (Debuffs > Healer Buffs > Etc buffs). Meaning, even though you say that he didn't have blood for blood up, it is entirely possible that blood for blood was up during the attack for the video.