Well, Naxxramas 200 as we call it is clearing the entire of Naxxramas with item level appropriate gear, this means
nothing above the intro gear (t7).
This gear mostly comes from
Rep, RDF heroic and early wotlk crafting recipes.
Wrong. While there is no actual achievement with doing Naxxramas in specific gear, it challenges you personally to reach DPS checks, Threat management and healing thoughput, this in itself as we see it is a personal achievement.
Yes. It's very important that you get the most out of your toon's potential. by no means is there no excuse not to put the effort into it. You will need to know the boss strats explicitly before hand. You should have the best available enchants/gems in your gear.
The boss strats are fairly straight forward but change between each boss, as illustrated below with the images and blocks of text.
The first wing we'll take a look at is the
Spider Wing this is commonly regarded as the easiest wing to complete starting from Anub'Rekhan and finishing at Maexxna.