4th job Single Target DPS

Just ran a few numbers. It appears that Final Blow is significantly beneficial for overall DPS after all. It runs at a standard 810ms, but does add more damage despite building combo slower. Without considering Criticals or Combo Ability, Overswing alone does 881.48%/s, and Final Blow does 916.87%/s on standard speed.

The test I ran involved comparing the overall damage output given over a time frame building to 100, 200, and 2000 combo (i.e. never running out, it will plateau at some point) given some attack range. The effective DPS was ~1432.6%/s building to 2000 combo using Final Blow, and only ~994.4%/s without it. Apparently, this was tested with Fastest (2) speeds, but they scale appropriately. The significant improvement in damage compared to not using Final Blow is attributed to the fact that Critical scales to your damage instead of to your hits, so you gain a significant bonus in damage from hitting critical'ed Final Blows compared to the other skills, as well as building up your critical rate is not as impactful as it was preBB. Using Combo Tempest is still a decrease in damage but not as significant as it previously was.

There is a slight start up range where not using Final Blow is minorly beneficial for the overall DPS, but it was not significant. It's something like Overswing only until Combo is 15+.