Conversely, the Abyss might be the best bet to stop Hell from ruling the multiverse. So I imagine celestials, including angels, would mostly deal with yugoloths, as these fiends thrive on the Blood War itself.
And yes, I know that neutral evil can be interpreted as pure evil, and thus the worst of the three. But what is the yugoloths' plan for the multiverse? Nobody knows, and that's what makes it so scary? Meh.
Except they would die anyway, and pretty fast by devil standards.