[Modding Help] Siege only faction?

[Settlerking]

I'm working on making a series of fallout faction mods and I'm contemplating making a "Boomers" faction. One of their quirks is that they like blowing stuff up and my thought was to make them only ever attack the player colony with sieges. Is this possible without additonal coding knowlege? I'm the most unskilled coder this side of the galaxy so I can only really make XML mods. Is this possible or should I just go for an explosive based faction instead with normal raids too?

[Canute]

Any faction beside tribes can do normal raids and siege's.
You could create a scenario where normal raid's are disabled any only siege's appear.

[Settlerking]

That's the thing, I just want this faction to only siege. Other factions I want to raid normally. It's like a unique faction quirk