Did this the other day and was mildly entertained so I though I'd share it with you all....

Step 1: Buy Froscrag Spire DLC
Step 2: Buy upgrade for vault
Step 3: Get Daedric Lava Whiskey from tombstone in vault
Step 4: Duplicate it X amount of times
Step 5: Choose city to invade
Step 6: Drink a [censored]load of the stuff (each bottle you drink summons a Dremora Lord for a minute or two)
Step 7: Start a fight
Step 8: ??????
Step 9: Profit

If you haven't done this yet, you seriously should try it.

Lmao that does sound pretty cool, I've got the vault but didn't see the lava whiskey I'll check again.

You get it from a rather hidden tombstone in the corner of the vault, and there is only one, so make sure you dupe it before you drink it.

Lol good thing I checked back, spend the last 15 minutes searching for that bottle.
Gonna try it out now, sounds like one epic fight

It's pretty [censored] hilarious, I chose to storm the Imperial City.