I did this from 79 to 80, i pulled 900k 1 hour + the ton of frostweave you get.
2 things you need to know.
1- You better be good (doing it without relying on ib).
2- Bagspace you need ton of it.
Basically you pull this whole spot (20+ mobs with 1k+ xp each)
You can see on this pic i only pulled 17 (count numbers)
Then when you clean it you go to this spot (you can only go there if you killed the elite with someone else)
And where is the map spot
There is alot of grind spots in wrath but this one trumps them all for leveling and frostweave. Also you can do with a tank/healer, aoe/tank... They respawn each 1min or so.