I advocate keeper getting a "peace" nano or perk.
Peace description:
Your opponents lose focus.
AOE 10m
What the effect of this is, is that the opposing force (mob/person/persons) essentially stop fighting (q), and their current target is dropped.
Why: Keepers are "protectors" So, lets say your doc is called, his HP is bouncing, you pop your "peace" perk, and the opposing side loses focus, their target is dropped, and your doc is saved. Hatelist is wiped.
Uber useful in PVP, less useful in PVM, but with strong support from enforcer, or other DD, could be a life saver.
IN PVP, however is when this would really shine, and actually give keepers a roll that extends beyond healing/support. It would actually make us protectors. UBER.