I hadn't found any new posts with builds to take advantage of their quirks, so I tried my hand at some and these are the results (caveat: I don't own a 5N or Fang yet, though that will certainly change with the upcoming sale).
Also, a camo scheme that works wonders is Phranken camo with the primary and tertiary colours black (or other dark colours), and the secondary colour bright orange (or other bright colours). Some scary Dragons right there!
DRG-1C "Glaurung"
DRG-1N "Smaug"
DRG-5N(C) "Hydra"
DRG-FANG "Fafnir"
DRG-Flame "Ryujin"
Enjoy
