I'm not sure if this works, but I think canine remains has an interesting interaction with the Curator.
Carrion Away removes a corpse marker and then drops one at end of activation. Corpse Curator counts as a marker but is not removed. Re-use on McMourning would drop the "removed" corpse marker within 2".
So 1 from Carrion Away, 1 from Re-use, and 1 being the Curator means you can sommon a Construct turn 1 for a bonus action?