I just wanted to share some of my hacking discoveries to contribute to this community.
1. Awhile back multen wow updated mob pathing. In some (Most) dungeons using flyhacks (THHH) you can gather up the mobs, float above them and AOE them. They will not go up and hit you. Prior to the update it was impossible to do this. Unfortunately I haven't found any raid bosses this works on, they stay on the ground but pretty much all of them have some sort of aoe that kills you.
2.Vehicle bugs galore. If you mess around enough with the vehicles, including passenger seat mounts, you can get some pretty bad ass effects. Including 100% damage/hp and 100% walking speed (It's cool but useless if you use hacks).
3. This is pretty common knowledge by now.. The Hitchhiker Hack is currently undetected by multen, so Speed/Fly/Mount on Water/No clip/teleport/TP behind target, all work. People on multen are quick to report though, so if your just finding this out don't go hackin' all over the place. You can find the link to it on this forum IIRC, I'm not going to post one incase it's an infected link.
I suggest to really experiment with the vehicle bugs, theres some really neat things you can do with that. Enjoy!