I would be happier with a way to retain/gain aetherflow stacks easier during heavy healing situations. I find that if I have aetherflow stacks at the ready I can dish out some decent multi target healing output by just using adloquium/physick on other targets while maintaining the tank with Lustrate. I think I would also like to see more mechanics with sacred soil. Perhaps stuff like this:

-If allies affected by succor are under the influence of Sacred soil double the heal.
-If the target of your lustrate is under the influence Sacred soil spread 25% of the heal to all nearby allies.
-If the target of your Energy drain is within your sacred soil the mana and health gained is spread to nearby allies.