Great build! I personally find the Umbra stacks a bit too much work, so my Pestilence build is 3x Lengmo (including Backbone), 1 Ceska, 2 Petrov (Contractor's gloves and a chest with Obliterate, but chest could be Grupo instead). I might replace the Ceska holster with Centurion's Scabbard when it arrives in TU22, but depends on its final stats. :)
