Tactically and ergonomically is it better to station your pistol holster from your chest rig(plate carrier), drop leg holster or war belt?

Sir, I would have to say that it is best to configure the holster in a fashion that is comfortable, ease of access based on how your equipment is set up, and how fast you can access and draw your weapon to fire in order to kill the person before they kill you.

First, you need to access your needs. Don't be Tacticool. Be tactical. You are a signal officer. You should have gear that fits your position. I am not sure if you need a war belt. Usually I have seen drivers do a chest rig. But don't do something just because it looks cool.

When I was a .50 gunner on a HMMWV/MaxxPro in Iraq I went with the Blackhawk serpa chest rig. Being in a turret it was an easier and quicker draw if I needed it.

As a Black Hawk Crew Chief in Afghanistan I went with the drop leg. Anything else got in the way of the restraint system. The lanyard did have a habit of getting snagged sometimes on the locking pin for the 240 mount, but beyond that it was best for what I was doing.