'Ordering' is better than DOpus, to me. Big fan, use it in every machine. Too bad the config program is not screenmode friendly (RTG).
It's fun to see that some one else has discovered and appreciates the efficiency of Ordering.
I must have missed something, what's magical about 1.7 MB free? You seem to be sacrificing much to get there. Is adding a fast ram expansion out of the question?
Fast Ram would modestly improve system performance, turn the Ramdisk into a far more useful tool, allow better disk buffering to improve access, etc.
You asked for software suggestions. You might consider an improved hard disk file system, like PFS3 (Hopefully, available in PD soon, it's much faster and more secure than FFS). There are faster serial port drivers, math libraries, and datatypes on Aminet.
Are you trying to see how far you can push the system, are you primarily a gamer? What do want this system to do?
