Okay, so I'm now seeing our two Tiefling characters, wizard and alchemist, as quasi-faustian, dark magic practitioners. Do they have 'hearts of gold' too?
Players (L10 characters) are:
1 Scott Dewar (Human Fighter) -- C/G
2 Scotley (Tiefling Wizard)
3 Mowgli (Tiefling Alchemist)
4 Helfdan (Fafhrd/Conan, Ftr/Rngr/Brbrn)
5 Red Knight (Race? Ranger) (butt-kicking, tracking, warrior-type) -- C/G
6 Kaodi ("Healer-y" Witch or Inquisitor)
Just spitballing here, but if one or two of you could take a level or two of Cleric, Druid, or Bard along the way the party would both gain some healing spells and the ability to employ healing wands as well. Or perhaps the alchemist can make enough potions to supply the party? Kaodi may have the healing covered, though. Another idea could be the addition of a henchman cleric. In another of my games we have asimilar situation, so we added a henchman cleric who is a 'party henchman' who doesn't count against the 'max henchmen' number of any PC -- he's basically the DM's character - he has no free will, doesn't help with problem-solving, but he provides an extra attack [so far he kicks as much butt as any PC] and some healing spells.