[@CaptainManbeard]

From the movies and books there is evidence that alot of Wizarding security is based around magic yeah, but we see Goblin security uses mechanical locks too.

But I would imagine that wards and barriers would be something he needs to work at as well. So his safe cracking would be part mechanical lock picking, magical lock picking and ward/barrier breaking as well.

So a little bit of both of column A, B C and D more or less.