Well, it's harder to find advice on the "DPS Tank" because it's the more dangerous way to tank. I personally think that people undervalue Parry because it's meant to periodically make tough hits easier to weather instead of giving you a noticeably larger Effective HP pool, but that's neither here nor there.

If you're sitting around 200 in Defiance with Fending Accessories on, you're doing something right somewhere. The Skill Speed discussion isn't just for DPS, however. It's also theorized to increase mitigation because an increase in Wrath Generation Speed leads to a greater uptime for Inner Beast. Either way, I think it sounds like a sound avenue to pursue. Even if you lose a little DPS out of it, the increased mitigation would probably be worth it.