Griffon's Eye and Lit Immunes

[Munkay]

The stats for the unique diadem Griffon's Eye are:

Defense: 150-260 (varies)(Base Defense: 50-60)
Required Level: 76
Durability: 20
+100-200 Defense (varies)
+1 To All Skills
+25% Faster Cast Rate
-15-20% To Enemy Lightning Resistance (varies)
+10-15% To Lightning Skill Damage (varies)

Does this mean Light Immune monsters that are within 15% of 100% (115%) are no longer immune to lightning?

Also, does Ormus' Robes increase Lightning Fury damage?

Cheers,

Munk