Arknights Welfare TG-6 Clear, Challenge Mode

To the Grinning Valley level TG-6, Front of Least Resistance, Challenge Mode, cleared using only Welfare operators.
So, Gladiia handles everyone coming from the bottom gates on the map by herself mostly. The top gates need lots of snipers, to kill the Smarties at a distance, and lots of strong melee operators, to kill the Lazies quickly so the snipers can work on the Smarties. It feels a bit like overkill, but it works.
Welfare operators are as defined at:
arknights.wiki...
wiki/Operator/Welfare.
Comments and advice are always appreciated.