The attack damage % used by Shield Wall is derived explicitly from the base off hand physical damage inherent to the gem itself. No amount of damage on a weapon in the main hand will contribute to Shield Wall damage.
Focusing on the Armour value on your shield is one of the methods for scaling Shield Wall damage.
Passive tree nodes that contain the text X% increased Defences from Equipped Shield such as Towering Shield, Core of the Guardian, Spiked Shield, and Flashy Deflection do not impact Shield Wall damage. Instead, they impact the final Armour value added to the player rather than the implicit Armour value of the shield itself.
Gem level progression
Level
Mana Cost
Attack Damage
1
0
0
13
65%
2
3
9
15
71%
3
6
14
18
79%
4
10
21
20
86%
5
14
28
23
93%
6
18
35
25
100%
7
22
41
28
108%
8
26
48
32
115%
9
31
57
35
121%
10
36
65
39
128%
11
41
74
43
136%
12
46
82
47
144%
13
52
92
51
153%
14
58
103
56
162%
15
64
113
61
172%
16
66
116
66
183%
17
72
126
72
195%
18
78
137
78
207%
19
84
147
85
221%
20
90
157
92
235%
Recommended support gems
The following support gems are recommendations by GGG as listed in-game, and do not necessarily reflect optimal combinations or the views of the wiki.
Gem tier
Support gems
I
Module Error: No results found for item using search term "item_name = Fortress"
HourglassHourglassSupport Category: Grants Cooldown Tier: 1 Cooldown Time: 10.00 sec Can Store 1 Use(s)Support Requirements: +5 IntSupports any damaging skill that you use yourself, causing it to deal significantly more damage but gain a long cooldown. Cannot support Skills which already have a cooldown.Supported Skills deal 30% more Damage Supported Skills have a Cooldown of 10 secondsPlace into a Skill's Support Gem socket in the Skills Panel to apply its effects to that Skill. You cannot have multiple Support Gems of the same Category socketed within one Skill.
Module Error: No results found for item using search term "item_name = Magnified Effect"
II
Module Error: No results found for item using search term "item_name = Close Combat"
Font of BloodFont of BloodSupport, Totem Category: Font Tier: 2Support Requirements: +5 StrSupports Skills which create Totems. Totems created by supported Skills generate a Font of Blood which will Leech Life to Allies within it.Totems created by Supported Skills create a Blood Font with a radius of 4 metres Allies in Blood Fonts Leech Life equal to 12% of Physical Damage dealt by Supported TotemPlace into a Skill's Support Gem socket in the Skills Panel to apply its effects to that Skill. You cannot have multiple Support Gems of the same Category socketed within one Skill.
Module Error: No results found for item using search term "item_name = Splinter"
III
Font of RageFont of RageSupport, Totem Category: Font Tier: 3Support Requirements: +5 StrSupports Skills which create Totems. Totems created by supported Skills generate a Font of Rage which will Leech Rage to Allies within it.Totems created by Supported Skills create a Rage Font with a radius of 4 metres Allies in Rage Fonts Leech Rage equal to 0.8% of Physical Damage dealt by Supported TotemPlace into a Skill's Support Gem socket in the Skills Panel to apply its effects to that Skill. You cannot have multiple Support Gems of the same Category socketed within one Skill.
HeftHeftSupport, Physical Category: Heft Tier: 5 Cost & Reservation Multiplier: 120%Support Requirements: +5 StrSupports Skills which deal Damage, increasing the maximum Physical Damage of their Hits.Supported Skills deal 30% more Maximum PhysicalHit DamagePlace into a Skill's Support Gem socket in the Skills Panel to apply its effects to that Skill. You cannot have multiple Support Gems of the same Category socketed within one Skill.
Module Error: No results found for item using search term "item_name = Rageforged"
IV
V
Item acquisition
Shield Wall has restrictions on where or how it can drop.
HourglassHourglassSupport
Font of BloodFont of BloodSupport, Totem
Font of RageFont of RageSupport, Totem
HeftHeftSupport, Physical
