From what I see, he has Rank-S minion, stigma +15 and daevanion +15.
He his using an apostle, so if you don't have one you are a bit slower, and he moves as soon as he can after pull.
propably a big casher boy.
No. This is Stella EM. CS or no, you won't have any advantage (there is no cubus for this instance).
Maybe he is using 20%, didn't see well, but even that... that's no big casher boy.
Did you identify your gear with magical and physical def on very armour part ?