Does the Deflection Aura impact the cleric using this power?
Here is the description of the power for reference:
Replacement Power: The following granted power replaces the resilient touch power[1] of the Protection domain.
Deflection Aura (Su): Once each day, you can emit a 20- foot aura for a number of rounds equal to your cleric level. Allies within the aura gain a +2 deflection bonus to AC and combat maneuver defense.
Yes, the cleric using Deflection Aura would also receive the +2 deflection bonus to AC.
Basically, you are always considered your own ally.