Kilrogg - Also Rune Tap keeps you from getting the Shred Armor debuff. If you're tanking Kilrogg make sure to keep an eye out for adds that may have snuk through, as you can grip them in, and slow them, saving your raid from dealing with an unneccessary add.
Chains of Ice works nicely on the smaller adds, especially useful on the Bloods
Socrethar - If you are tanking Socrethar in second phase, position yourself so that you are always within range of gripping the Shadow adds. This leaves dps just worrying about the cleave and not keeping check on when they spawn. If you're not in inter