With only a little deliberation, the party stuck poor Fil under a bush (I prefer to think it was a Fil-odendron, nyuk nyuk) and formulated a fantastic plan to return to the Frog Room of Doom to seek their revenge (for... um... breaking into the monsters' home in the first place).
Indis the elf (my wife, Cori) would animate four long-dead dwarven skeletons from the mine to lead the charge, supplemented by a Phantasmal Force spell depicting several more skeletons. Next, Elazti (Aisha's magic user) would hide, invisibly, and wait to see if the frog creatures bunched up enough to be taken out by a Fireball spell. Finally, Ambiorix (Sam), Fil (Ben), the dwarves (NPCs) and Bob the cleric (Andrew) would swoop in to deliver the killing blow if necessary. (The frog beasts seemed to have a pretty significant number of hit points in addition to three deadly attacks per round.)
To make a rather involved combat story shorter, the party's strategy worked. The monsters rushed to attack the skeleton "army" invading their temple and, after a couple of rounds, were close enough together for Elazti to loose a fireball. They weren't killed outright, but they were severely wounded enough that the dwarves, Bob, and Ambiorix made short work of them.
Cue massive XP award and much leveling by the PCs.
The Breaking of the Fellowship -- Goblins, Gnolls, Bandits, and the long road to Ravensport.