Does Campy even make Athena anymore. The reason I’m looking is to replace an older Campy Comp Triple. There are very few road long cage rear derailleurs available anymore. The nice part about Campy is there is no double or triple specific front shifter until you get into the 11 speed range. Which is sadly all there is left now.
What chainrings and cassette are you looking to run? With the advent of wide-range cassettes, a lot of "short-cage" RDs have quietly mutated into medium-cage, and "medium-cage" RDs have mutated to take on a lot more capacity than before.