The Rare enemy mod that reduces damage taken from distant sources (with the sphere around them indicating the range) appears to also reduce damage from “% of damage reflected” sources (e.g. Grand/Orante solar idols of Riposting, Reflective prefix on Shield/body armor).
My expectation was that reflected damage bypasses all defenses, including this rare mod.
I most easily see this with Diamond Matrons and Siege Golems whose big AoE attack will hit 8x Ring of Shields minions (who have ~140% damage reflection) and survive, whereas typically they would die almost immediately.