I think Houdini Crowds should have an option to orient particles when them detect each other with the trigger type Particle Proximity.
If you have two crowdsource nodes in a simulation to fight against them like in a battle, a way to orient the forward vector of each particle to start de battle state.

Something like this but by default in the trigger node.

This a bit better

I'd suggest submitting an RFE for this. It might be a useful addition to something like the POP Steer Align DOP.

I didn't have realized about the RFE section. I'll do. Thanks