The attack damage % used by Resonating Shield 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 Resonating Shield damage.
Focusing on the Armour value on your shield is one of the methods for scaling Resonating Shield 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 Resonating Shield 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
417
30%
2
3
9
482
33%
3
6
14
552
36%
4
10
21
627
40%
5
14
28
708
43%
6
18
35
794
46%
7
22
41
886
49%
8
26
48
984
52%
9
31
57
1090
55%
10
36
65
1202
57%
11
41
74
1321
60%
12
46
82
1449
63%
13
52
92
1585
66%
14
58
103
1730
70%
15
64
113
1885
73%
16
66
116
2049
77%
17
72
126
2223
81%
18
78
137
2409
85%
19
84
147
2607
89%
20
90
157
2816
94%
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
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Wind WaveWind WaveSupport, AoE, Trigger Category: Wind WaveSupport Requirements: +5 DexSupports any skill that you can use, triggering a blast of wind that Knocks Back enemies if you are Stunned while using it.Trigger Wind Wave when Stunned while using Supported SkillsPlace 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.
Explosion Converts 100% of Physical Damage to Fire Damage Cannot Break Armour Explosion radius is 1.4 metresPlace 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.
Break PostureBreak PostureSupport, Attack Category: Break PostureSupport Requirements: +5 DexSupports Attacks, causing them to Daze Enemies when they fully Break Armour.Supported Skills apply Daze when fully Breaking Armour Daze lasts for 8 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.
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III
Coming Soon
Coming Soon
Coming Soon
IV
V
Item acquisition
Resonating Shield has restrictions on where or how it can drop.
Wind WaveWind WaveSupport, AoE, Trigger
Armour ExplosionArmour ExplosionSupport, Attack, AoE, Trigger, Fire, Payoff
Break PostureBreak PostureSupport, Attack
