Are you sure it's condensation and not simply unburned gas puddling? 3 black-sooty plugs on one side speaks of a severely rich fuel mixture, but why one looks good leads to other questions. All this looking at fluids doesn't answer many questions. If you really want to know the internal condition of an engine and pinpoint the faliures in various cylinders without a tear-down, just do proper leak-down tests and vacuum tests to answer what's really going on in there.