Guild Wars 2

While the tests armor and traits setting was not changed. Only a skill to increase a non Condition Damage attribute was used.
Condition Damage from Toughness

• Toughness: 2630
• Condition Damage: 1630
• used Damage Skill: Signet of Earth (7s bleeding for 4.193 = 599 dps)
• used Buff: Elementalist – Earth Attunement – Scepter 2 Rocket Barrier [+250 Toughness]
• modifier: Elementalist – Earth Specialication – Major Trait 2: Strenght of Stone [Gain Condition Damage Based on a Percentage of Toughness: 10%]

After using Buff:

• Toughness: 2880
• Condition Damage: 1630 (should be 1655)
• Signet of Earth still provides 599 dps

Condition Damage from Power

• Power: 1000
• Condition Damage: 1630
• used Damage Skill: Signet of Earth (7s bleeding for 4.193 = 599 dps)
• used Buff: Elementalist – Fire Specialication – Minor Trait 1: Empowering Flame [Gain power while in fire attunement / Attribute Adjust: 150]
• modifier: Elementalist – Fire Specialication – Major Trait 2: Power Overwhelming [Gain Condition Damage Based on a Percentage of Power: 10%]

After using Buff (attuning to fire):

• Power: 1150
• Condition Damage: 1630 (should be 1645)
• Signet of Earth still provides 599 dps

Same thing occurs with runes like Superior Rune of the Undead [(6): 7% of Toughness is converted to Condition Damage]. No adjustment in Condition Damage by using a Toughness buff through weapon skills and Signet of Earth still 599 dps.

Example for Elementalist
Used modifier:

• Superior Rune of the Undead [7%]
• Strenght of Stone[10%]

Used skills:

• attuning to earth [+ 150 Toughness]
• Rocket Barrier [+ 250 Toughness]
• Signet of Earth [+ 180 Toughness]

As a result Elementalist is missing 580 Toughness * 0.17 = 98.6 Condition Damage. (129.2 with Conjure Earth Shield [+ 180 Toughness])