Dear Betty,
According to development journal raid 19 boss can be controlled by most control skills:
Problem that it is not, most control skills aren't working. Especially Imperial Executioner skills, which none of his is working. The only control hero who is a bit effective is silencer.
The boss HP is massive, 1 billion to be specific. It took me 40 tries to reach 700K damage on a good RNG. She uses ultimate way too often.
We are top guild in our server and at this rate the boss needs three month to kill. Please revise, at least with control skills.