The party get's drugged somehow (maybe accidently, maybe a monster, some npcs...) and spents the session running around through a magical realm full of mad hallucinations and wunderful theories about the universe. Would probably work best in a big city, lots of input there. At the end they wake up to the laughs of spectators on the market place or something.
What about going after trip and saying for fluff that you actually trip using powerful wind? For that matter you might actually try to build a combat maneuver character with maybe wizard cross classing or something else that gives you wind-related class powers. So when you bullrush you surround yourself with a shield out of strogn wind that actually does the pushing, disarm would be a blow of wind and so on.
I'm running for a 3 party group and only one spellcaster (oracle) - They are doing fine and usually have an NPC with them jsut because it kinda happened.
CUrrently they run around with Kyra (the official paizo one) because she was the headpriest of Sarenrae coming to Kelmarane and they decided they want to have her with them.
Salim - Human Spellsinger/Oracle of Pahrasma/Sarenrae, finally got vengance against the Carrion King