Unconventional warfare. I sneak in at dusk to drop a few bombs before an evening of raiding.
Explosives are blast to raid with. You can put so much pressure on an enemy over such a short amount of time.
My goal was to crumble as much of their T3 as possible, as they had built T3 on T1 in multiple locations, making it very fragile.
Mission accomplished, and had a blast doing it.