Hi there,
a new OXCE feature has been merged and will become available in future builds: New targeting options for the PSI Amp.
You can now define which factions can be targeted with the PSI Amp.
An example looks like this:
# 1 = player, 2 = hostile, 4 = neutral
items:
- type: STR_FRIENLDY_FIRE_PSI_AMP
psiTargetMatrix: 1 # 1= player faction only, defaults to 6 (hostile + neutral)
This would define a PSI Amp which can target only allied units. You can disallow targeting of your own or other factions explicitly with this.