So the best solution is: MMULibs+Muredox (instead of OXY or CyberPatcher)+MathLibs?
I think so, been using it here for many years and really like it. There's certainly nothing wrong with the Phase5 software, and of course you can run the HSMathLibs along with that, too. I just prefer using one related set of tools for as much as possible.
My idea of a patched 3.9/060 system -
Added or replaced in ROM (as modules, burned/blizkicked ROM image, etc):
exec_44.1
tlsfmem
console.device_44.10
ram_handler_44.24
shell_45.27
mathffp.library (from the HSMathLibs package)
mathieeesingbas.library (from the HSMathLibs package)
mumove4k
ChkInts
PowerWindows_BKPatch
NoClick
FixGetMsg
SpeedyIDE (use on your A1200 if IDEFix doesn't work with your CF card)
Romfixes
Most this stuff is available in the BlizKick and Remus archives, and I imagine some on Gulliver's site as well.
Ran from startup-sequence:
mumove4k (if not already in rom)
mufastzero (forgot to mention, this also remaps exec and expansion.library, if run with the above)
mufastrom
cmq060
taglife
env-handler
Additionally with non-RTG systems:
FBlit (needs careful configuration)
FScreen (only fun for periodic tinkering)
FText
BlazeWCP
Other miscellaneous bits:
AutoUpdateWB
WarpDT
PowerWindowsNG
IconBeFast
PowerIcons
Probably forgot a lot, but that about covers everything major.