Died floor 18 running an archer build. I had a turn 1 damage of 4,110 before consumables, and with 3 water-skins or meals in the arrow slots I could have swung for 16,002.
very nice arrangement. though would have been much better with mouse wood instead of belt of knives, using only 2 arrows in the1st and 3rd row diagonally touching doom ring.
both belt and doom ring give raw damage but you are lacking multipliers, hourglass on its own isn't enough
also with huge multiplier from mouse wood, conductor would be useless and could be replaced with stopwatch or energy/mana stones
for reference 18 energy (6 +3 meals) with mouse wood-doom ring 2 arrow combo with 25 mana does ~45k damage