Just a quick vid on how to bypass the champion mechanics solo on master difficulty. This does involve getting close to the champions so be careful,
With oppressive darkness you will need to light attack 3 times with your Falling guillotine followed by a heavy attack,
The last clip is a different method where i use a witherhoard and 2 light attacks and then heavy.
Things you will need -
Falling Guillotine with whirlwind blade
Oppressive darkness
Solar plexus for titan
Peregrine greaves