if ASPD is not an issue the strongest per hit is actually triple rock step RTE with EA10. Howver, there seems to be a delay in spam speed even though there's no animation at zero cast when i'm using RTE. Need more testing to confirm if its worth.
Rank second is 4 rock step valk hammer (insane cost)
Rank third is 2 rock step Robot's arm. Robot's arm is way stronger than crimson mace if you're using any form of ATK mid/lower (like seraphim or Imperial feather+necklace).
Rank fourth is 1 rock step Pile Bunker S
Rank 3 and 4 are very close in damage btw. Depending on your headgear, sometimes pile bunker S will outdamage the robot's arm. I'm not using Old Driver's band, but rather i'm using HWHB for full delay reduction, so robot's arm outdamages pile bunker S.
With all that said, i myself am using robot's arm atm.
Edited by blackCROSSCY, 10 October 2018 - 08:19 AM.