Disarming Attack Reads, "For your debilitating trick, you can attempt to disarm the target. Choose an item the target is holding that would be subject to a standard disarm combat maneuver. The target must succeed at a Reflex save or drop that item. If the target gains a bonus to its KAC against disarm combat maneuvers it adds this bonus to its saving throw, and if it is immune to the disarm combat maneuver it is immune to this operative exploit. Once you have used this ability to attempt to disarm a creature, that creature is immune to your disarming attack for 24 hours."
Would anyone know what the Reflex DC would be? It refers to all the bonuses but not what the Reflec DC is.
'If an operative exploit allows a saving throw to resist its effects, the DC is equal to 10 + half your operative level + your Dexterity modifier. If it requires an enemy to attempt a skill check, the DC is equal to 10 + 1-1/2 × your operative level + your Dexterity modifier. '