Navratilova did not skip the 1986 Australian Open. The Australian Open was not held in 1986 because of the change in the calendar to move the Australian from December to January.
Graf holds the Open Era record for most consecutive Grand Slam finals reached (13 straight finals - French Open '87 to French Open '90) followed by Navratilova (11 straight finals - FO '85 to US '87)
Navratilova holds the Open Era record for most consecutive tournament finals (23) with Graf and Seles tied for second place with 22 consecutive tournament finals each.
Best left-right combination by a German (and that includes Max Schmeling): Steffi Graf. All she did in 1987 was knock Navratilova out of #1 and try to knock Evert out of the sport. (Mike Lupica in "The Best and Worst of Tennis in 1987", World Tennis)
"A couple of years ago, we nicknamed Steffi Graf's forehand 'Jaws'. And that music would go perfectly when she starts running in to the net, swarming on that little ball." (JoAnne Russell, during the 1988 Wimbledon final between Graf and Navratilova)