I don’t really break strings that are like 0.63 or less but my vote goes for BG-65 / BG-3 / factory strings for being a tank in durability. People had those on for years.
But for playability and extreme durability those 0.69 strings have my vote and would be my choice, Zymax 69 / VS-69 / NBG95.
BG70p would be on my list as well, but too bad its discontinued ;c