Alright, let's try something different. Fight fire with fire, and snakes with centipedes, Vrishchika thinks. "Don't be alarmed," she calmly says to her friends as she enters a casting trance, this one much longer than her previous spells'.
Well, I have crap BAB, so shooting anything into the fray is risky and all my other spells are area effects or won't do anything (Sleep - 10 ft. area, Color Spray - 15 ft. cone, Web - yeah, Acid Splash/Acid Splatter - ranged, Glitterdust - it's a snake, it can track with its nose/tongue). So...
Summon Monster III - Huge Fiendish Monstrous Centipede. Will appear on my next round.