If there are multiples valves on the pressure line you maybe need this?
flow-on-demand pressure-compensator.
https://hydraforce.com/Flowcont/Flow_html/5-422-1_EC10-32/5-422-1_EC10-32.htm
Installed before the valve: 2 from the pump, 3 to the valve and 1 from the LS betwen the valve and the shutle valve.
Will this work?