Originally Posted by
Higg
Unless you're having difficulty staying alive, which you shouldn't in a 5man heroic, you shouldn't be using Seal of Insight. Yes, it's great for boss fights and raiding when there's a substantial amount of time spent below 80% hp, but in a 5man heroic you should have no difficulty staying alive with a healer.
So, if you're having difficulty with threat, use Seal of Righteousness on trash and Seal of Truth on the boss. The fact that Seal of Truth was nerfed is irrelevant; SoT is for single-target damage, SoR is for AoE damage, SoI is for improved self-healing. If you're only fighting one target, and you don't need more self-healing, then you should be using Seal of Truth. If you like carrying healers, though, I suppose you could use Seal of Insight and continue to do cruddy threat. When I tank trash in a 5man, I use SoR and I'm always top on damage.
Also, it's good to encourage your dps to always target your target.