Database
[{_id:ObjectId("62a5c5d741c1059e0f498c2c"),guild:985255000194318336,user:595024631438508070,balance:156,bank:100},{_id:ObjectId("62a5c5d741c1059e0f498c2d"),guild:985255000194318336,user:595024631438508070,balance:151,bank:102}]
Query
db.collection.aggregate([{$addFields:{sum:{$add:["$balance","$bank"]}}},{$sort:{guild:1,sum:-1}}])