Stuck while Rebuilding Intel VROC Raid 0+1

About a month ago, one of the 4 drives in my array went clicky. I was able to identify the 2nd drive (sdb of sd[a-d]) was the bad drive and thought I failed/removed it. After getting a replacement drive and getting as much data as possible, I don't think I'll get anywhere without editing imsm metadata.

cat /proc/mdstat
Personalities : [raid0] [raid1] [raid6] [raid5] [raid4] [raid10]
md0 : inactive sda(S) sdd(S) sdc(S)
     15603 blocks super external:imsm
unused devices:

I took a closer look at "mdadm -E /dev/md0"

/dev/md0:
          Magic : Intel Raid ISM Cfg Sig.
        Version : 1.2.01
    Orig Family : 6453e91b
         Family : 6453e91b
     Generation : 0003c070
  Creation Time : Unknown
     Attributes : All supported
           UUID : bb0620fd:8274f3f7:498f64a4:dacbd25f
       Checksum : 8e303583 correct
    MPB Sectors : 2
          Disks : 4
   RAID Devices : 1

  Disk00 Serial : WD-WCC3F3ARCLKS
          State : active
             Id : 00000000
    Usable Size : 1953514766 (931.51 GiB 1000.20 GB)

           UUID : 5a9f14bb:a252fd06:f08cf7cf:b920b29e
     RAID Level : 10
        Members : 4
          Slots : [__UU]
    Failed disk : 0
      This Slot : 0 (out-of-sync)
    Sector Size : 512
     Array Size : 3906994176 (1863.00 GiB 2000.38 GB)
   Per Dev Size : 1953499136 (931.50 GiB 1000.19 GB)
  Sector Offset : 0
    Num Stripes : 7630848
     Chunk Size : 64 KiB
       Reserved : 0
  Migrate State : idle
      Map State : failed
    Dirty State : clean
     RWH Policy : off
      Volume ID : 1

  Disk01 Serial : 57E07H1MS:0
          State : active
             Id : ffffffff
    Usable Size : 1953514766 (931.51 GiB 1000.20 GB)

  Disk02 Serial : WD-WCC6Y0RL73N1
          State : active
             Id : 00000002
    Usable Size : 1953514766 (931.51 GiB 1000.20 GB)

  Disk03 Serial : WD-WCC6Y0LPDK7T
          State : active
             Id : 00000003
    Usable Size : 1953514766 (931.51 GiB 1000.20 GB)

Interesting! So It looks like the metadata is coming from /dev/sda, Disk00. This is the first time I've noticed 4 drives, and that "Disk01 Serial : 57E07H1MS:0" doesn't look "WD" like the other "WD" drives. I wouldn't be surprised if I missed something in the --remove process. I've had access to the "Intel virtual raid on cpu intel vroc for linux user guide" pdf for lots of insight. The "update-subarray" stuff looks like what I'll need to research next to figure out [Volume0]'s Failed disk and Disk01's metadata. I'd expect something like

# mdadm --update-subarray=0 --update-id=ffffffff --state=failed /dev/md0

but that was from piecing together some examples I found in the "Linux-Intel-VROC-TPS-335893.pdf" I found. Any help getting the array --run-ing again would be appreciated.