We've got Damage auras, defense auras, healing over time auras. However we don't have a healing boost aura.
Boost incoming heals by n%. Should an incoming heal crit, even if the crit multiplier is 0, the heal hitting the target turns into a burst AoE hitting nearby players/pets within a range of 5/8/10 meters. Healing burst can only trigger once every 5s per recieving target.