Hey dood,
I run my Wals into the Symmetry, then into and MXR bass envelope, then into the Darkglass Vintage, into the B3K and then into an MXR Bass Chorus and a Carbon copy.
Formerly I also had a Duality in front of the Vintage, but that was just too much going into a Mesa Walkabout w/ two 1x15" Diesel cabs ... I found that pairing the vintage with the b3k is the way to go for me and my (Rock)band.
ta
Oliver