Neverwinter epic Lair of Lostmauth kill 13 seconds.
Here is x4 Legendary outlaws and a random killing lostmauth in 13 seconds from start of combat to death.
Here's What the group consisted of:
Dps/Debuff Cleric 2.6IL (Outlaw Alt) ZEUS)
GF 3.8IL (Outlaw) (Felgar)
GWF 3.7IL (Outlaw) (Morglum NeckSNapper)
SW 2.6 IL (Outlaw) (SMOKEY 2.0)
HR 3.0 IL (RANDOM)
As you can see not all of the group was big item level but the timing was perfect and everyone hit their rotations perfectly.
Here's how i coodinated the rotation's (ZEUS)
I instantly put hollowed ground down on entering and stand as close to lostmauth as possible and then hit astral shield.
Morglum then pops Lantern with Felgar hitting into the frey inside the astral sheild.
After 7 seconds Smokey hits his lantern and i throw down x3 divine glows in divinity and then empowered forgemaster's flame.
We all get knocked back but Morglum does not at the end so he manages to get the final part down which shows we had a little luck also.
Better item levels with this timing makes me believe Lostmauth can be killed within 9 seconds.
xbox one - neverwinter lostmauth lostmauth kill epic lair of lostmauth devoted cleric great weapon fighter scourgewarlock hunter ranger guardian fighter