I was testing mp levels and xp and I am very happy to reveal that on mp1 doing the Crypt of the Ancients runs with only a red gem in my helm for xp gear I was able to clear 500-800k xp per 40 second run.
The run itself will vary severely between players and classes but this is what I do.
I posted this method a good while back and if you check my profile for he original link it is there.
Start on the broken blade quest and choose talk to aleric as your step.
Take the waypoint to aleric and run down to him to get your quest.
After he activates the bridge, fight your way to the Crypt of he Ancients.
This will ensure you a checkpoint when you enter the dungeon.
Clear out this dungeon as fast as you can.
There is always 1 elite in here so if you can kill him first, awesome!
Once you clear he room.... townportal and repeat by enyering a new game. His time you start in the crypt.
Some things to keep in mind. Chaining kills gives you a nice bonus of xp and helpa a lot. Also try to kill the elite first to get your 1 nv stack.
This may sound boring, and to some it is... however I just did 20 runs in 18 minutes picking up 19 rares and 1 set ring (wd set z.... something)
Faster than anything I have run, including alk runs on my ww barb so far
Withthe mp1 xp bonus and clearing the whole area so fast, the xp is insane per minute.
Higher mp settings just make he run longer.l and lessen xp per minute.
Test it out and post some results!