What single symptom or combination of symptoms are most lethal in Pandemic 2

Get rid of the "Gift" symptom they give you. Buy Waterborne and Airborne right away. buy ONLY the first two of heat and moisture resistance. Sit back and accumulate about 110+ points, then buy only TWO drug resistance. Buy, hemorrhaging, heart failure, fever, diarrhea, sweating, vomiting, ataxia, fatigue, and kidney failure. That will kill the world in less than 60days, getting you on the high scores board. Each game will be 200,000+ score.