No Doubt

No Doubt
Defeat a boss without ever killing or interrupting any of the Mawsworn Doubtcaller’s spells while the Torment “Backup” is active during a single run in Torghast, Tower of the Damned.
Check if Torment “Backup” is active
The final boss will come with an add that doesn’t have a lot of health that will cast slows and dots on you.
You must kill the boss without killing the add.
No cc or interruptions either on add