[Wrana]

I must say that I didn't find Earth Knigs with Stymphalian Wings a good combo even in SP. Maybe area-effect swords and/or char shield could be more useful? Or just making them shoot away with, say, Earthquake - but here Rainbow Armor would be better...
Considering Air Queens I have found them quite useful with Rime Hauberk (chill aura) & Storm Staff. The latter could probably be replaced with some sword & char shield, but they already have additional attacks, & Storm increases their power. Armor could be relaced with Bone breastplate, of course.
Agree about Fire Kings.