The Elysian salute is the same as their bow, it includes slightly lowering the head while retaining eye contact and extending the wings to a certain degree. The exact amount is a subtle science comprised of both their rank and the esteem in which you hold them - to see a Patrician in a fully extended salute is an exceptionally rare event, typically only accorded to a Paragon - with the half extension being traditional towards the Duxi and Legati.