Well, with all the ICC rep farming, there was plenty of downtime so I got bored. I finally decided to level up my weapon skills and sure enough (especially in 25 man ICC) the skeletons at the very beginning of the instance level your weapons quick. it took me less than 200 swings to go from 200 daggers to 400.
So the trick is, when you zone into a fresh instance (25 or 10man) there will be skeletons that run in the front to the guards. Make sure you don't pull their initial aggro 9if you do cloak if you can. After they engage the guards, just run up to them and swing away!
These skeletons do not give rep and have alot of HP in 25 man (around 1.7 mil I believe) in 10man they have about 400k. This represents an issue in the 10man, as when the mob dies, it does an aoe explosion that does 10k. In 10man it is possible to have multiple skelly's die at same time.
Enjoy! I know I did!
Whoops on skills up less than 1 per swing! I was quite tired when I made this post!
Also!!!! For those that have a cloak skill!
grab a mob with a dot or couple of instant attacks and drag the mob past all the guards back to the entrance, cloak and if Tirion grabs the mob he holds complete aggro and only hits for 5k and never dies so you get alot longer time on the mob!
Enjoy!