This is how you can level you weapon skills easy, I have done this with many chars and many diffrent weapons.
What you need:
Xyz (or something like it)
Some kind of a speed hack
And a naxxramas raid id that have not killed "Gothik the Harvester"
It takes me around 5-10 sec to get to the boss so this is a really fast way to do it.
1. Enter naxxramas.
2. Load your speed and xyz
3. Speed thru military quarter to "Gothik the Harvester"
4. Use your xyz to glide upp to him.
5. Start skill your weapons on him.
If you stand to cloes to him you will get teleported down after a while so try to keep it as far away as your weapon can reach.
Screens:
Missed to erase my name in the corner but I dont bother to change the picture anyway:P