u/xkrews90

I'm having a real hard time getting past Wandering Wight and the other boss after him. I don't understand why I can't immobilize him and then shortly after transform into Red Tides. I have to pick either one or the other. I've seen videos online of people doing it though. What am I missing?

Any tips on how to beat either of these fools would be most appreciated. I can get Wandering down pretty low and then I run out of stamina and get wrecked.