This flow progression helps the feeder learn how not only to feed well (not so easy with 2 swords), but also to start working on choosing openings, and begin baiting and causing reactions in their partner.
Meanwhile, their partner gets to work on improving their evasion and general defensive skills at the same time.
Having just spent an evening reading a historical fencing techniques manual, which is pretty much as mind numbing as reading step by step instructions on how to salsa, I just don't have it in me to describe it in words.
In the same way that over a couple decades, Sonny went from this:
To throwing descriptions out altogether and just doing it ....
I think I will avoid the technical description ... but of course would be happy to flow it with anyone that is interested :-)