Hello there!
(Sorry for the big pictures)
Here is a guide for you how to get close enough to Uldum, so you can pull mobs and kill them.
This is just one spot and a way to get this close.
For this you dont need to be a certain class to pull the mobs/get inside.
You can do this all by yourself, but if you got a controllable pet its easier.
I use my spell "Eye of Kilrogg" to see when its in Uldum and when its Safe(AQ), there is also more ways to see this, as with " [Blue Crashin' Thrashin' Racer Controller]" you can buy this in Dalaran Toy Store.
1. You fly to Silithus and run down to Ahn'Qiraj: The fallen Kingdom. Once you'r there you walk to the left so you stand outside that Instance.
2. Die JUST outside, if your Warlock you can use Lifetap > Hellfire. If your not, Delete your HS > Stuck.
3. Now you'r dead and you'll be a ghost inside of AQ, the thing is that you are on the dead gryphon. So you fly as close to your corpse as possible, and then you accept (inside of the instance not outside of it). You don't need to be in group to be in here and there will be 0 mobs.
4. Now you run this way.
Sorry for the big pictures.
Once there you die again.
5. Then you fly up to the little area above, accept corpse there.
6. If your looking into the wall you run to the right and there is a little hole into the wall. Run into it as far as you can. Die and Release.
7. Now you run back to the corpse again, and accept as close to the other wall as possible.
8. Now you run a few yards to the big wall and die there again. Release and run back.
9. Accept your corpse on this big wall.
Now you dont have to die/release run anymore.
10. You see a big tower looking thing to your left. And you run behind it like this.
11. You run untill you see a little gap in the mountains going in abit.
Here you use whatever you need to use to see the line so you dont get into Uldum(=Insta portal outside, and you need to do the whole thing again)
12. I use to stand here
13. But if you wan't solo this and dont have a pet you can run to the right insteed there is a place when the mountains going in ALOT so you can pull them from 40 Yards easy.
Well now its up to you what you want to do. Have fun.
Hope you understand ^^
You ppl with pets. click on the "Move to" button and move him into Uldum, and then you can just press Attack. And it should do the work to bring you the mobs.