The Corrupted Egg Shell (
Corrupted Egg Shell - Item - World of Warcraft) absorbs more damage than the tooltip says. I noticed it during the bossfight of Nefarian. He casts a ~100k dmg aoe every 10% but if you use the Corrupted Egg Shell right before the aoe comes you will get no damage at all. Make sure the shield doesn't get consumed before. I didn't tested it with other things but it may also work.
1. wait for the aoe Announcement of Nefarian (or other dmg spells)
2. use the Corrupted Egg Shell
3. ????
4. Profit