You can decide to focus on focus on attacking keeping dps your high.
or focus on keeping your mitigation by keeping TBN and other mitigations as soon as they pop. If you focus in the damage, sometimes you will not have enough magic for tbn, making you vulnerable in a w2w.

Tank Focus on damage is great for bosses. Bad for w2w where your focus should be in keeping the agro and surviving by mitigating.