Invalid B Tree Node Size Software Striped RAID

Hey there, as you saw I've come across this wonderful error on my internal software RAID 0. I made the set in Yosemite, and have since upgraded to El Cap. Everything was working fine, and then I booted over into windows and it told me my drive was missing. I jumped back over into El Cap and got the "This disk is unreadable..." dialogue. DU is little help. So I jumped into terminal and started poking around.

diskutil appleraid list

AppleRAID sets (1 found)

===============================================================================

Name: CLUTCH

Unique ID: 939CC378-D082-4E61-900E-8B5BEC10A54B

Type: Stripe

Status: Online

Size: 8.0 TB (8000219643904 Bytes)

Rebuild: manual

Device Node: disk6

-------------------------------------------------------------------------------

# DevNode UUID Status Size

-------------------------------------------------------------------------------

0 disk2s2 2C1A7EB3-03DF-4C7E-826A-77924139FE39 Online 2000054910976

1 disk5s2 83258A0F-B0FB-433A-B99A-AD106BB5598D Online 2000054910976

2 disk3s2 9EC38CC0-F90D-4463-9398-18046366852C Online 2000054910976

3 disk4s2 6F09923E-0B32-4388-B374-FF8E4E7FF6E7 Online 2000054910976

===============================================================================

So all the disks are online, and El Cap can still see that I had named the set CLUTCH (In DU it just lists a 4 of "Untitled" disks)

Then I tried repair volume and got this

diskutil repairvolume disk6

Started file system repair on disk6

Repairing file system

Checking Journaled HFS Plus volume

Invalid B-tree node size

The volume could not be verified completely

File system check exit code is 8

Updating boot support partitions for the volume as required

Error: -69845: File system verify or repair failed

Underlying error: 8: POSIX reports: Exec format error

Do any of those extra error codes point someone to hope? Is there a way to fix this that doesn't involve wiping the drives and starting over?

P.S. I know running an 8 TB striped RAID is risky, I have it all backed up with backblaze. I'm not a lunatic.