From WoWWiki
| Improved Scorch
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| Your Scorch spells have a (100n/3)% chance to cause your target to be vulnerable to Fire damage. This vulnerability increases the Fire damage dealt to your target by 3% and lasts 30 sec. Stacks up to 5 times.
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| Usable by
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| Class
| Mage
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| Properties
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| Location
| Fire, Tier 4
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| Affects
| Scorch
|
| Ranks
| 3
|
| Requirements
|
| Points required
| 15
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Improved Scorch is a mage talent that causes the Scorch spell to have a 33/66/100% chance to cause your target to be vulnerable to Fire damage. This vulnerability increase Fire damage done to your target by 3% for 30 seconds. Stacks up to 5 times.
This is a multiplicative damage increase that stacks with other damage increases and is calculated after Spell damage gear has been added. For a mage with a 10/48/3 fire build vs a target with 5/5 Fire Vulnerability the effective damage increase is 24.63%; 37.09% with Curse of the Elements applied and 40.83% if the Warlock who cast CoE has 3/3 Malediction.
| Rank | Chance to debuff
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| 1 | 33%
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| 2 | 66%
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| 3 | 100%
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