Saint Tarrant, lessons learned

Just get out, schizos.

...

Guns are inefficent.
Go for chemical/bio warfare. Potent poisons in a tank with a timed release. Gives you plenty of time to set up many such tanks/canisters, especially if you're smart about it and put them/mask them so they won't be found for a long time.

Easiest is bomb, but again, Tarrant wanted to use guns for this reason: