| Ciofey |
The problem is this: There's no one in the party a Doppleganger can easily replace. We have four PCs: A Paladin tank who relies on her Summoned Mount and Lay On Hands (which a DG can't duplicate); a Half-Orc Cleric of St. Cuthbert who is a constant healer and caster; a Sorceress with an Infernal Bloodline (shown through Heritage Feats) who also casts constantly and uses unique feat-based abilities, and a Halfling Warlock/Rogue who is constantly Spider-Climbing walls and who hasn't touch a weapon in ages.
Church of St C gives powerful Half-Orc priest a Test of Humility, to prove that he understands the value of the gifts of St C. No casting of spells the next seven days. Go!
Paladin, same thing + no laying of hands + no mount. Go!
Guild of Wizards approaches sorc about binding ritual to prevent her infernal side from taking over. Side-effect: no spell-casting. Go!
Warlock, same thing + Slippers of Spider Climb. Go!
In all cases, potions & wands are allowed/available. Just no spellcasting.