I tried to clear as much of the sewers as possible before needing the campfire, but I think I'm going to have to finally use it, I've used up almost all my spells. Oh, and per usual the warlock girl doesn't have any spell extend feats which are absolutely mandatory for doing effective casting. When you clear the demon room you'll find a magic lamp with a genie that will grant 3 wishes, one gives you an item or 300k gold, one duplicates an item, and the last heals and raises the party from dead with full recovery, saving that for later.
Items are as follows:
+2 Skeletal Sabre one handed sword (Life stealing, keen, swift, barbed, paralysis immunity)
+1 Terror Blade dagger (attack roll bonus, draining, destruction, extended crit range)
+1 King Garamond's greatmace (destruction, swift, valorous, increase strength +4, increase constitution +2)
+3 Jaggolan short sword (attack roll bonus, sickening, swift, collision, disease immunity)
+1 Xanthar bastard sword (blinding, swift, shocking, shocking burst, electricity immunity)
+5 Elianthir chainmail (mithral, bravery, greater bravery, ghost ward, +10 speed)
+5 Infernal full plate (adamantine, acid defense, greater acid defense, disintegration immunity)
I decided to wish for the mace and then had him duplicate it and handed them off to my gladiator, who has oversized two weapon fighting, she destroys everything.