How much of the items damage reflects on the summoned iron golem?
https://www.theamazonbasin.com/wiki/index.php/Iron_GolemCode
Damage, defense and other stats are calculated as though armor or weapon were equipped. All stats apply, with the exception of the following:
Off-weapon +% Damage from any source (including Fire Golem synergy bonus) applies to the sum of any weapon damage and base damage.
Translucent when made from an ethereal armor or weapon.
Level used in chance-to-hit calculations and in determining attack and defense rating is caster level at point of casting.
Stats are set at point of casting.
Golem Mastery and Summon Resist apply.
+% Life from Battle Orders and Oak Sage is applied after +% life from Golem Mastery.
Iron Golem thorns only applies to itself and is always overridden by Thorns, even if the Iron Golem skill level is higher or Iron Golem thorns returns more damage. When Thorns is no longer applied, Iron Golem loses its own thorns as well.
D2R: caster's Physical Immunity Sundered, Magic Immunity Sundered, Fire Immunity Sundered, Lightning Immunity Sundered, Cold Immunity Sundered and Poison Immunity Sundered are applied.
Summoned again in a new game if Necromancer has at least one skill point invested or a skill bonus. Stats are based on skill bonuses applied at the beginning of the game.
Can open doors.
Cannot be put into hit recovery or knocked back.