What's the best way to find a dead cylinder?

Wow, so if I am reading your gages correctly, your % of leak in each cylinder is roughly? :

#1 - 16%
#2 - 80%
#3 - 90%
#4 - 79%
#5 - 80%
#6 - 95%

I've never tested a motor that bad. Was the test done on a warmed up engine? Again, are you sure each cylinder was at TDC with valves shut? Those numbers seem insane to me for a running engine. Maybe I am reading the numbers wrong.