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Usually, I do the simplest thing: all the stuff goes on one big ext4 partition. I don't make a separate partition for /home. I'll make a swap partition if I can remember but I've forgotten to do that before and nothing bad happened. The bootloader goes on a fat32 /boot/efi on the same drive as whatever the Linux install is on. This way I can swap around the drive to different pcs if I have to or easily change/upgrade drives without having to reinstall all my stuff.
This strategy works for dual booting Windows also. I'll put the windows install all on its own separate drive so it won't try to erase grub during a disk check or something. That happened one time. Also, by putting Windows and Linux on separate drives you can use the bios to boot between Windows or Linux if you mess up one of the bootloaders.
The two drives thing is an interesting strategy. I might look into implementing that. Thinking of switching to an arch based Linux from debian.
I also use this method and it's worked great for a long time.