If your mage is at least level 13, cast Greater Malison and Chromatic Orb on the dragon...if you're lucky, it should kill him. If Jahiera can summon Fire Elelementals, by all means use them. Send them in ahead of you so that Firkraag wastes his spells on them. I suggest getting Keldorn as well...someone to use Carsomyr =)
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