Semi-dumb question about OT

[Chrono_Rising]

Yes, when not actively tanking you should be in your dps stance.

I can think of perhaps one case: The Emanation (Extreme), where the boss will throw out extremely powerful cone attacks at the second in the threat list, and you want those directed at the offtank.

At all other times, you focus on DPS'ing. If the boss doesn't have tankswap mechanics, it's preferred that you use Provoke, then Shirk, whenever Shirk is off cooldown.

This is confusing. Even in this case you should not be in tank stance as an off tank. You should provoke and shirk your main tank and if needed use your aggro combo to adjust your spot on the enmity list.

Even better, do a circle shirk to boost overall enmity, give both tanks a large lead on enmity, and avoid needing to use your aggro combo entirely.