"Looks like she's coming down for us," Solstafir said with a grin. The time for his ax to taste the beast would soon come. For now he scooped up one of his harpoons that had missed and gave it another try at wounding the spider princess.
Spoiler
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Zombie can't hurt her through the DR so it will ready an action to attack any smaller foes in reach. And switch Essentia into Incarnum Defense
Solstafir readies to attack during the spider's offensive action
attack - (1d20+12)[16] vs. flatfooted AC
piercing damage - (2d8+8)[18]
If hit Reflex DC 10+damage taken or harpoon stuff