My fifth party's Spellhold fight with Uncle Jon. One of the team of inspired lunatics that joined us in the battle (I forget who, at the moment) pulled something I hadn't seen before: they cast Death Fog. This killed off all the evil clones, at the cost (cough) of killing all everybody on mine side except three of my personal gang, and Jon. Fortunately, Irenicus was so far gone that he quickly gated out.
That's when the parade of assassins began to arrive. Amazingly, Imoen was able to keep two at bay (presumably Stoneskin helped), while I used the resurrection wand to bring back Anomen, my cleric. He was under attack almost at once, but had excellent armor and a fine weapon. Oddly enough, Cernd, whom I'd had alive all along, was being severely beaten up in his greater wolfwere form, so I kept him on the run until I could dislodge his pursuers, and let him revert back to human for a few spellcasts.
It's nice how the game occasionally throws a spanner into the works, and derails the obvious from time to time.