Resolution:
When an application uses a LB connection factory or LB URL separated by ‘|’ symbol, the EMS client API will connect to
all servers listed in the url first. After that APIs will get the statistics related to the selected metric (connections or byte_rate).  
Then, the client API will pick the best server based on the metric and connect to that server. This is not configurable to go in any order or selection matrix is configurable. So APIs don't have capability to select the order. So round robin fashion or any other order is impossible.