The problem with focusing all your efforts on one or two sides of the conflict is that you completely miss other sides. As such, this is Strange's first time to hear that the angels have an idea of how to break the Severing. But it only takes him a few moments to make a snap judgement about how well they might do in the first place.

"I doubt that," Strange remarks, with a bitter laugh. "Do they even have a catalyst?" However, that line of conversation's stopped as one of the angels fires a spell in their direction, targeting Strange but seemingly overlooking Yuya. Thankfully, Strange casts a quick barrier spell, strong enough that the angel's spell dissipates on impact instead of hitting them.

"Look, you need to leave."