Dervishes have very large [[footprint]]s, and can be hit by multiple spells at once. Witch Doctors have great success against the Dervish with [[Plague of Toads]] since the Dervish is so large that 2 or 3 toads from each cast will strike it. [[Charged Bolt]] is also effecteffective, for the same reason. Neither of these spells is reflected away, either, perhaps because they are ground-based, rather than floating?