Ok, well i was thinking, and I think this would work BEST for a hunter, First you need to find the raiding guilds on your server, check there website and check out their upcoming events, If at any time they are doing any world dragons, hopefully it says which one and at what location, be at that location at the time they are about to fight him, as soon as you see the main tank going in Shoot it, make sure you have good timing so you dont like pull aggro like crazy, if they dont notice you, they kill it and you get loot, if they see you..........
.....change servers lol