Pirate %/s (KMS RED and GMS Unleashed)

Is this including soul seeker's hypers; does this include when soul seeker has built up enough orbs; does soul seeker have a maximum limit of orbs-in-progress?

That's with Hyper Skills because that's currently the highest hits/s. Even without Hyper Skills, Angelic Buster still has the highest max/s of any character with Hypers regardless of whether she uses Trinity or Soul Seeker.

There's no such thing as "building up orbs" with Soul Seeker. That's like saying there's a minimum amount of time before Hurricane is shooting its max arrows per second. Although the damage done of every attack isn't immediate, as long as the target is not dead, it will propagate their average hits. There is no limit to the number of orbs in progress.