Stone sky and sea question

[Moomba33]

You can calculate it yourself using the time it takes you to clear the dummy and the dummy HP values from the Reddit link.
DPS=Damage done/Time (seconds)

Looking at the O9S Ninja dummy for example:
5626.40=1012752 HP/180 seconds. 180 being taking the full 3 minutes exactly. So you just sub in the number of seconds you took (180-time remaining) to find your dps.

For example if you killed it with 30 seconds remaining:
DPS= 1012752/150 seconds=6751.68

If you aren't killing the dummy you'll need to calculate how much health you depleted to find your damage done.
For example if the dummy ended at 5% health that means we did 95% of its health in damage over 3 minutes:

0.95x1012752=962114.4 damage done
962114.4/180 seconds =5345.08 dps