Consolidated picking for non facility orders

Summary:

Hi Experts,

We have a business use case which we are unable to map in the system (Warehouse Management System) and it looks there is no straight fit solution for this. Hence we are looking for your expert's opinion. 

Use Case: Consider we have 50 sales orders (not facility orders) having common items between them. In existing, system generate tasks such that the picker goes to a location (Active or Reserve) and picks the entire quantity to fulfill 50 sales orders in a single go against one container label (it can be considered as OBLPN LPN number in our terminology).  

Once items are picked it is brought to Staging area for segregation. While the segregation system guides the supervisor with item and Quantity to be segregated order wise. Once it is done they proceed with loading and shipping.