well if you do that mate, it's your call.
I have 3 turboprop types on my license and I've never done it and never would. As I said my life's not worth it.
Oil drips/seep sources can be seen at shutdown, fixed and run again
Large air leeks can be heard a mile away over a running engine- or any disturbed clamps checked with some speed tape as mentioned.
Fuel leaks as per oil also with a touch of developer spray but I've always found them very obvious.
But as I said, it's your call, we'll agree to disagree