last time i played a shaman was pre tbc so i dont know much about itemisation now

- is there any "equipchart" where i can see wich items i should get (pre kaar / heroic / kara / ssc / and so on ) ?

- is there a big difference in mail / leather / cloth for shamanhealing ?

- what about the moonclothsets (aka http://www.wowhead.com/?itemset=571 Whitemendwisdom / http://www.wowhead.com/?itemset=554 Primal Mooncloth) ? are they worth it ?

plz tell me all your information regarding shamanhealeq .. thx