Factory pads seem to give the longest life. At least from what I’ve ran. He’s probably just that aggressive on the brakes. He could add cooling to the brakes and that’ll make them last longer. Or getting larger rotors.
Also if you’re unsure about a change you made in the tune post it up and we can take a look.
Edit I think there’s still a timing calculator floating around somewhere that’s very helpful.
It was possible 09 if not 10 when they added stabilitrac. My 08 doesn’t have it. But I believe dually didn’t get stabilitrac until 11 if I remember correctly
Probably hard to find someone to walk you through everything. But in the interest of keeping helpful information available. Do you have a specific table you have a question with? (I’m not going to discuss hard limiter or emissions related)