I didn't see this in anythread , even tho it is kinda old .... anyways so here you go ...
First: You have to have Tree of Life talent point .... - lolz
Second: You need to find any portal ( Any instance or other type of portal)
Third: You morph into Tree of life . Then you start to run into the portal , once you jump in ( at the same time ) you right click " Tree of life Form " not the aura.
you should reapear on the otherside of the portal without being in Tree of Life forn and still have the Aura ... the + healing aura work and it give the aura to the party members .... you cast any other form and the Aura will stay
I haven't tested it in Arena so if any1 want to try it in Arena feel free to bump this thread
btw ,this will work for sure and it is pretty easy to do just make sure you right click the form when your character is in the portal ...