1. http://www.wow-head.com/spell=32379#changelog
2.
Afflicts the target with a disease that causes 1088 Shadow damage over 24 sec. 15% of damage caused by the Devouring Plague heals the caster. This spell can only affect one target at a time.
3. Завышен урон
4. CataFun UP14

Расчет урона от 14th june 2011
http://www.howtopriest.com/viewtopic...21&t=465#p3848
базовый урон - 155
коэффициент СПД - 0.185
(155 + SPD * 0.185)

и с учетом патча http://eu.battle.net/wow/en/game/patch-notes/4-2-0
Devouring Plague damage done has been decreased by 12%.
(136 + SPD * 0.163)
эта формула 100% соответствует тултипу клиента
(136 + SPD * 0.163) = 650
640 * 8 = 5200
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на этом же скрине видно урон по манекену - 800 * 8 = 6400