Harmony is quite new to me, and although the wiki for it is quite extensive, it doesn't really show me an example of a working Harmony mod for RimWorld. However, after looking at other mod authors' examples of the basic implementation, I tried it out for myself and after a few times of RimWorld telling me the mod did something bad, I finally got it to work.
The newest version introduces a check for potentially lethal diseases and infections. Colonists who have these but haven't developed immunity are excluded from the raid points calculation.
Also in this version, I reduced the contribution of building wealth further, to 1.5 points per 1000 building wealth.
Today I also released a direct download of this mod and six others on my website, so if you don't like getting your mods on Workshop, now you can get them elsewhere. :)