ID are indeed the most dangerous due to their initiative and speed. And if you play with Winghelm, they are guaranteed to go twice, before the first high-level units of the opponent. And that really means death for archers. But for them to attack any other level 7 unit is suicide (unless it's a sworn enemy)... And even after they fly off to bomb the archers, they die like flies.
Асха - Порядок! Ургаш - Хаос! Силат - Воздух!
Шаласса - Вода! Аркат - Пламя! Силанна - Земля!
Сар-Илам - Дракон-Маг! Эльрат - Свет! Маласса - Тьма!