Lightning Mastery, Applied Twice?

So I heard that a Sorcs lightning mastery is applied twice when using dual dreams. Of course poor paladins don't have lightning mastery but items like griffons or light facets have +% light damage. Would a Dreamadin with lets say a 4 socket armor (4 x 5,5 facets) get the +20% applied twice or does this only happen with lightning mastery?

Now if the reason the lightning mastery is applied twice for a sorc is that there are 2 different sources of holy shock aura, then would a pala with dual dreams and using holy shock aura have the effect applied three times?

Also if a Paladin uses holy shock along with 2 dreams, then are all the auras added together? Helm Dream (15) + Shield Dream (15) + normal holy shock aura (lets say 20, but I guess you could get alot higher) means level 50 holy shock active?

Thanks.|||+% Lightning Skill Damage from Lightning Mastery and items is applied to Holy Shock's lightning attack damage before it's added to weapon attack damage; it's then applied to weapon attack damage when using a melee attack, but not when using a ranged attack (although the character screen displays ranged attack damage as though it is).

So, with 20 points each in Resist Lightning and Salvation, Level 30 Holy Shock Aura When Equipped would apply approximately 1-7,005 lightning damage; +20% LSD would increase this to approximately 1.2-8,406, which would be the actual lightning damage applied by a ranged attack; when using a melee attack like Zeal, +20% LSD would be applied again, increasing this to approximately 1.44-10,087.2.

A Paladin equipping a Dream helm and shield for Level 30 HS Aura When Equipped while supplying level 20 HS would only have level 30 HS lightning attack damage added to his attacks, but radial damage from both level 30 and level 20 HS would be applied: level 30 HS would apply approximately 1-1,167 radial lightning damage every 2 seconds in a 23 1/3 yard radius, and level 20 HS would apply approximately 1-655 radial lightning damage every 2 seconds in a 16 2/3 yard radius, so in total both auras would apply approximately 2-1,822 radial lightning damage every two seconds in a 16 2/3 yard radius.