Good point.
@Goldfish, could you send a flock of ravens down there so that we can see what tricks these things got up their sleeves? They might be able to spit webs, cast spells or have other nasty surprises.
I think we need to try to convince DP to go ahead and retroactively give Viserys the Robes of Mysterious Conjuration upgrade that we paid for and had enchanted the turn before last.
Ravens might do the trick, but a summoned Bralani or Janni would be better, IMO. Now that we have Arcane Spellsurge, it becomes more practical, from the action economy PoV, to bust out summons mid-battle.
[X] Plan "When in doubt...BIRDS!"
-[X] Viserys uses the Staff of the Old Gods to send an unkindness of ravens into the midst of the spider horde to gauge their reactions and any unexpected abilities they might possess.
--[X] If nothing unusual occurs, Viserys descends close enough to ground level so that he can target the monstrous spiders with Firebrand (normally 270 feet maximum range, now varies between 250 and 300 feet due to Wild Magic) while the others wait.
---[X] He first targets the larger spiders with a Searing, Agonizing, Firebrand as a Swift Action, then follows with a Searing, Merciful Firebrand, targeting those same spiders, if necessary, or smaller stragglers if not.