Does it affect bosses?
It affects them by ripping their faces off:) But the knockdown only affects small and medium sized hero versions of mobs (medium= manticore, voidleech…) Anything with purple/red name won’t be affected no matter the size.
The DA debuff affects all targets.
Thank you very much for your reply. 
hey my friend yeah it’s effect but not big part just little part okay
I love bashing the hell out of bosses with blitz. 