Hi guys,
thanks for having me back. To show my gratitude i'll shamelessly copy some info from wowwiki i think we might find handy to have. First off the order of difficulty of the wings:
Arachnid, Plague, Military, Construct and frostwyrm.
I did construct while travelling and yeah, it wasnt easy. Heard the first three were pretty much a joke so might be a good idea to farm those a bit to get some epics distributed ;)
Wont go into the tactics as you can read everything you need to know at http://www.wowwiki.com/Naxxramas and i suggest you read up on the tacts a bit before we start a raid.
Anywho hope it helps.