to avoid confused and editing my second post, IA is now worth dropping for the majority of the fights in ICC. If you have a second spec that has IA 3/3 in it that is great, otherwise look to spend the points in magic absorption instead.
http://www.wowhead.com/?talent#of0ifz0fzxGuMtedcZbhf0o:zNi
something like that (I like to have the slow talent for a few of the fights like Deathwhisper, Dreamwalker, Saurfang, and Lich King). I assume points could be moved out of meditation into SotM if you want to, I would keep the points in the frost barrier so that you can still get mana back on frost absorbs, or put it into ice shards for more AoE power, up to you really.