Naxxramas should drop legendary two handed great sword. I don't know for sure, I just know it drops other legendary items. I got a heroic two handed great sword from the Jade dungeon.
If you want to get the Sniper badge on skill alone, you can use the Revolver for the first 5 or so levels (it has a fair accuracy, aim for the chin/head), then the UMP (aim a little high and the spray will get a headshot) after that upgrade as fast as possible to the Hunting Rifle (aim down a bit, upper chest), and keep upgrading till you get to the Barrett (deadly accurate).
Welcome to Pinata Express, where we're guaranteed to build you a pinata to hold endless amounts of candy that's unbreakable, unless you bring a chainsaw to it! How can I help you?
"Sir, we are almost out of power! Shall we shoot more bullets more quickly and actually aim at him?"
"Don't bother, in 12 seconds he will spontaneously combust! Mwuahahaha!!!!"
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