Sorry to disappoint you, but its not possible for disc to reach 10k absorbs. You see those big numbers on val'kyrs (i have those too you know) because there are absorbs from orbs, and since addon cannot distingush between your shields and absorbs from orbs, the numbers get seriously inflated. Seening other fights, where absorbs are much better tracked, i would think about 5-6k absorbs per second is max you can get, assuming you do nothing but spam PWS. But usually i'm also assigned to watch tanks, so tanks usually get penances, and a few flashes, ProM is on CD also, so absobs drop a little, to about 4k, and my healing is about 3,5k. Thats why i said 7k.
I also feel like disc is good for phase 3 on Anub, but we havent got to it yet, have to deal with high tank damage on first fight while learning... i guess that was the reason to bring pallys.
well, its kinda hard to compare incoming damage. You see the drop in damage taken, and you assume that people got better in getting out of fire
but i see your point.
The problem really is not that i dont get into raids (actually, i took part in 3 out of 4 first kills in H-ToC), but that i feel helpless when so much damage is flying around, my single-target shields dont feel so powerful, because on those heavy fights i cant really pre-shield, i just patch people in hope other healers are going to top them out. When tank damage is so high, i cant bomb them like paladins, all i can do is small silly flashes while my Penance and shield are on CD. Its frustrating.