Why has nobody mentioned a Vindicator on full auto? I mean, load that sucker up with SnS(I hope your pockets are deep) and fire on full auto narrow burst, and you're doing 20S on half armor. Which, with a single net hit, puts you on the ability to overcome a Force 12 spirit's armor. Assuming that it doesn't negate the SnS half armor thing.
That said, at this point you're ghostbusting with a minigun and sustained taser fire.
But let's say I'm forgetting something, and that spirits are immune to stun damage, and such.
Our weapon of choice: GE Vindicator with High Power Chambering, Personalized Grip, Electronic Firing, a Gas Vent 3 system, and a Gyromount system.(I believe these RC modifiers stack.) If I remember right, these all stack. Have a street same with foot anchors installed, for an additional +2 recoil comp. It should equate to 11 recoil comp and then +2 from the foot anchors, for 13. Let's say through all this, you have a sammy with high enough strength to provide +1 RC. Assuming you play by those rules.
Now, a vindicator with high power chambering fires at 8P -2 AP. Firing on full auto, which you may now do, will equate to 22 physical damage before net hits. Next, the bare minimum of 1 net hit provides you with 23P damage.
This will grant you an ability to reliably combat your average Force 6-8 spirit, and maybe even Force 11s. Maybe, if Admiral Awesome and Lady Luck like you, possibly even Force 12. If I'm understanding the rules right.
So, take that every GM who said I couldn't solve everything with a minigun!