Hello! I shared my config, you can look at it here. While I didn’t consider Super + Fn + Number or Super + Number, I think there is a lots of ways how to type then without top row.
Using top row you have to shift whole hand or you would get strain trying to reach that row with only one finger, while others are on their home row positions.
Please do recommend a silent short-travel switch that fits the standard socket.
I can’t recommend because I didn’t take keyboard on vacations or travel. I imagined there should be no problem while having hot-swaps, but never faced it. I might be wrong.