Greg, 4 would be tough for me. I find my best cigarettes are when I mix more varieties. That said, I am minimizing too.
Black mammoth (dark air)
Golden Burley (white stem, short aging easy cure)
Bursa (oriental)
Silver river (unclassified) woodsy/cedar undertone to me
Bolivian Crillo Black (unsure classification) I get a chocolate/coffee undertone after kilning
Flue cure is tricky, I will grow 3, because of maturation times to spread the timeframe of flue curing.
Dixie Bright 27 , first
Hickory Pryor, second
Big Gem, last.
All three gave good yield and leaf thickness but matured a few weeks apart, so everything doesn't come ripe at the same time.