4th job Single Target DPS

You can't do what your suggesting because an assassinate boomerang step combo takes 2 seconds to complete. You are basically telling people to mulitply 80k * 480 times (8 minutes). If you want to show DPS, it has to be in minutes or several seconds because combos don't just burst out in 1.0 seconds. Hell BS takes 1.4 seconds. I bring this up because that second does indeed count.

Once again let me reitterate, this is a suggestion not a demand. This spreadsheet is by far good enough to do what I'm suggesting on your own time. I'm only telling you it can be more precise head on.

Yes, you can.
Say a Boomerang step combo takes 2 seconds and does 80k damage.
Then essentially you do half a combo in 1.0 second, so your ADPS is 40k damage. That's what he has calculated on that spreadsheet.