Thunderbug's Carapace
LEVEL 50 - CP 160
Type Overland
Set bonus
(2 items) Adds 1487 Armor
(3 items) Adds 1487 Armor
(4 items) Adds 129 Spell Damage
(5 items) When you take Physical Damage, you deal 750 Shock Damage in a 5 meter radius around you. This effect can occur once every 3 seconds and scales off the higher of your Weapon or Spell Damage.
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Storm Knight's Plate
LEVEL 50 - CP 160
Type Overland
Set bonus
(2 items) Adds 1487 Armor
(3 items) Adds 1487 Armor
(4 items) Adds 1206 Maximum Health
(5 items) When you take non-Physical Damage, you deal 375 Shock Damage to all enemies within 5 meters of you every 2 seconds for 6 seconds. This effect can occur once every 6 seconds and scales off the higher of your Weapon or Spell Damage.
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Both sets are heavy armor, have 2 armor bonuses, and both proc from being hit. According to zos, both of these sets should either scale resistance or max health, but instead, both scale with weapon/spell damage. Storm knight has 0 contribution toward damage increase it all of its bonuses are defensive, while Thunderbug only has 1 spell damage bonus. Both sets had there damage reduced to mediocre state and with this scaling they are more than useless.

In my opinion, both sets should scale with resistance, if not, then their bonuses should be changed to support their scaling and have their proc change to support offensive play style.