A SCH to Regen 5 everyone is highly recommended for the Serket unity, let's face it people are slow to use their antidotes, and relying on a WHM to poisona will be even slower, so having regen on will let all the slow people survive long enough to realize they're poisoned and use their antidote before they drop dead. Hell even if you're fast you'll still take quite a bit of damage before the antidote goes off, so it helps. Other than the poison it's a pretty easy fight
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