Ok, will give symlinking for runit a go...

Though, it doesn't quite explain why adding mdadm as a daemon to rc.conf is working for me, currently, per the wiki I just added: https://github.com/voidlinux/documentation/wiki/Installing-On-UEFI-with-BIOS-RAID-%28FakeRAID%29
However, if symlinking is the proper method, I'll give that a go later today, and update the wiki page, accordingly.

Thanks, much! Liking Void, very much, so far!