>17190 iron cluster
>5490 sand brick
>15300 coarse alluvium
>6300 rumbling orb
>6750 steel liquid
>5400 untamed flame
Those were the required mats for 5 Bubs + 1 SBaha bullets, and I always delayed this farming FOR YEARS because rough calculations were ~3-4k free quests in total (of different variations because each quest dropped only specific bullet mats) and several thousands of pots, not to mention all the time it would require.
But with new quest I think I've spent less than 400 Half AP pots and I'm pretty sure it was way less than 1000 clears in total. It's even more impressive because I went for 27 FMJ V in total (9 for 3 Belial bullets into Hexa bullet, 9 for 3 Faa bullets into Faa0 bullet and 9 for 3 Bubs bullets just in case - crafted SBaha bullet from some extra bullets that were given in Tower of Babyl rewards so I didn't have to farm FMJ for it) instead of 18 FMJ V like it was required for previous BiS 6-rifle bullet setup.