And for sure also commented on the wrong topic..;-)

I was able to 3* Nightmare 12-7 using (spirit affinity) Princess Lilitu as lead with Ma'Shalled.  I forgot exactly how long it took, but I think it was 2 to 3 minutes.  I have to give credit to HellHades champion optimizer.  I tried on my own using the same two champions as well as many other combos and just couldn't get it done.  But after "optimizing" both it took only one run.

i

Hmmm, well apologies all.  I tried to go back and rerun the 12-7 nightmare campaign with DL and M'S and things did not turn out the way I remembered.  So either my team was different or I did get lucky with the randomness of the battle.  I do know I used champions I optimised with the HellHades champion optimiser, but now I have to repeat that effort and update the entry.  Again, sorry about that.  Cheers.

We're back!!! lol

I used Goffred and Paragon level 40. Just in case Paragon's UK would not be available, Goffred can save him once. Took me one try with those two

scryl and  paragon

Don't you have a time problem with Scyl as damage? 

I've tried a few times using Elva and Inquisitor Shamael because his 3-hit A2 is doing around 100k damage but i invariably get caught with peril with Mortu just a few slaps from dead. 

best way to clear nightmare is using artak, pair him with a sycl or deathknight and its pretty easy, he can actually even solo some stages.

Duchess Lilitu & Ninja 3 * 12-7 Nightmare.

I did it with UDK and Bad-el-Kazar, using a champ who places poisons without attacking helps keep that devastating attack at bay.

This thread just refuses to die ...