There was some nuance to the question that sort of took it in a particular direction.
The discussion started after someone posted a picture of a cool bolt/wingnut/washer mnemonic device. And the question was how long would it take to put 24 (or 12) words into the right order.
12 vs 24 from the dictionary of 4096 words? Both quite secure. But if you had the 12 washers and did not know the order, doable with enough CPU power to run the permutations. 24? Not so much.
So I think we were talking about different parts of the elephant.
Ahh yes.. if anyone has physical access to your bolt and nut, you're probably almost screwed, especially if they have not yet disassembled the device. If they were stupid enough to unlock the nut and spill out the washers randomly, then you have some time to move the coins (assuming that was not your only copy of the seed phrase).
First of all very few people have access to my "bolt and nut". Ehem... that aside:
Personally in my imaginary scenario I had stored my bolt and nut at my bank, which was blown up by antifa protesters severing the bolt (dear Jesus), and scattering my nuts (this has to stop now - plus they're WASHERS) and I then had to put them back together.
In the end (har har), I decided that the very best strategy would not only be to stamp the word on each washer, but a numeral as well (1-24).
After this I also thought it might be cool to stamp them in something other than the actual order and store a key to that in a second place.
Nifty - but maybe more complicated that it should be...