Long story short, I came up with an idea, but just from even a cursory glance at the scenarios I've sketched out, oligarchs seem to be much much too potent for PC's to deal with in a campaign. They live forever, have hella money and influence, and the will to use all of it to make people miserable. What sort of weak spot could you possibly hit in a being that's lived two or three times at least as long as your PC's, and has all those advantages? You can't even say kill them, because death is temporary.
If you used them in your campaigns, how did you work around the obvious power imbalance?
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