Let us take a look into this matter a bit. Let me take the Asral clergy as an example. They are warclerics, serve the god of war, yet they barely seen in PvP combat and not likely to start a war on either "goodies" or "badies" how come?
Easy.. currently their clergy is the only "marked for PvP" guild that has no groupheal ability or an ability to heal other members in their groups. Means.. an Asral team is more likely to loose in PvP than any other if it comes to group combat. This is the reason its possible that invading the Asral fort or Arborea is easy pie for the insects. As they have only self-support abilites we can say the longer a battle lasts the more obvious Asrals will simply lose.
Yeah.. you can say: well, the Crusaders have no healing abilites either, but they can be and are mostly backed up by the Taniel Clergy in skirmishes. In a war they are surely backed up by the Taniels. Asrals simply can't have friends by code that would heal them if they turn on either goodies or badies (they're mostly "too good fo Sathos and too bad for Crusaders&Taniels"). Potions can't be used in combat so they're simply doomed. What we have now is some kind of workaround.. they are not teamed, but definiately helped by other factions. As we all know without that support they simply unable to defend themselves
Why did I brought this up? Currently they're mostly stay out of greater scale conflicts. If you look at things and consider them you'll find it understandable. Its simply discouraging for players to play a warcleric who can't do anything in a REAL war (aka greater scale group PvP). Why would they risk guilditems, being hunted by stronger groups without the REAL possibility to defend themselves or strike back?
Of course you can aways say: come on.. they should train themselves, work aroud new tactics, collect friends... My answer: So far so good.. then go and try defend your fortress against insects, or Sathos or Crussies&Taniels when they retaliate and see what happens
So its understandable they simply choose to hunt Ogres and Trolls. Simply stay out of global polititics unless they forced into it as a puppet of either Crusade&Taniels or the Sathonite branch.