Bolillo wrote:What's the best use of them? Besides killing alts in the plan of rebuild the cursed timber piles where they come from

Don't do that to yourself. The throughput even if you are absolutely efficient at running through the tutorial is still going to be "Bah, this takes too long".
Can you still throw them in fires? If you can that would be a thing. Throw them in your stove or bread oven. Otherwise, onto the ground they go.