You might want to look at the Unreliable Mediator Guide that some guy maintains:
https://mediators.github.io/
I use Picasso unofficial 2.1e.
The Adaptec PCI cards are terribly slow, you must have some very weird reason to use one... like you really want a slow external SCSI port for external CDROM maybe?
I can't really advise you on the card order since it seems all over the place. One configuration works for one person and a different for another. Here are some examples of how I have them:
A4000D
--Top Slot--
4) Rapture G4
3) 100MB NIC
2) Voodoo 3
1) SB128
--Bottom Slot--
Old configuration was:
--Top Slot--
4) 100MB NIC (is not blocked by Sonnet RAM)
3) Sonnet G3
2) Voodoo 3
1) SB128
--Bottom Slot--
A4000D-Towerized
--Top Slot--
5) 10MB NIC (for OS4)
4) Rapture G4 (Or Sonnet)
3) Voodoo 3
2) FM801
1) Spider USB
--Bottom Slot--