Defend: Make a lot of friends, or get a big org to help you. Call backup when you suspect you are getting raided, and witness them get destroyed.
Raid: Feng/Daymon/Fredy/Everyone's favorite tactic: Explosives. Plant 2-3 explosives (depending on the house), and blow them all in order to destroy doors and defensive props.
Otherwise, get good at shooting, and simply kill the raiders on your own. Should be easy enough with an AK.