The most difficult alternative

I was always afraid of the Dungeon faction. It's easiest to defeat them with the Chaos Dragons, but it depends on who you're playing as.

I was actually asking which unit is better to build: Magic Dragons or Phoenixes when playing against Haven. What do Chaos Dragons have to do with it? I'm obviously playing as Sylvan:)). Who else would I be playing as if we're talking about Phoenixes and Dragons?:))