Tanking with lightning warden isn't as hard as you think it is. You just have to monitor your HP and resilience. And as for the focus recovery thing. I have tested this with and without the focus regen and i see no difference in HP healing. Warden has no focus so the BT ring is almost completely useless as the OP said. Focus does not heal warden at all. And even if it did, it's misleading and would have been patched by now to say HP recovery instead of focus. As of the time i have posted this, it still says focus recovery even though the ring is for warden only.