To the Grinning Valley level TG-5, Freedom of Explosion, Challenge Mode, cleared using only Welfare operators.
My clear here is neat and controlled at the beginning, grading to totally chaotic at the end. I put out all my pushers and pullers, to maximize the holes. Then lots of block and physical damage. That's the best explanation I have. You'll just have to watch and see for yourself.
Welfare operators are as defined at:
arknights.wiki...
wiki/Operator/Welfare.
Comments and advice are always appreciated.