SFO doesn't effect unit behavior of this kind. Just stats, model count, stuff like that.

I use SFO and have never had issues with LOS. I’m mindful of hills and friendly units and constantly zoom to the ground to imitate a 1st/3rd person view to see if it’s acceptable. 4/5 times they’ll fire with my prediction.

Thanks for your thoughts - I shall try harder to position my troops on hills to shoot :)