Sez 'oo? Caster's are rare.
I dunno, it just seems to me that if casters could become Rulers, more sides would do it. Rulers generally don't leave their capital anyway, since getting croaked is such a danger to them, so why not have a Ruler that can be useful when not on the battlefield? To me, it's always seemed like casters kinda stand outside of the normal heirarchy a little bit, what with their ability to use magic and go to the Magic Kingdom when nobody else can.
Can Overlord's even pop non-heir family members?
Warlords can be be popped as a heir (though it apparently takes longer and costs more than popping them normally) or upgraded to heir later. So far we don't know if it's possible to have more than one heir at a time. Plus, we don't know what the distinction is between between warloads and casters that are considered family members and those that are not. Does it simply mean any warlords or casters that are popped under a particular ruler? Firebaugh sees Wanda as his daughter, but Slately doesn't seem to see his casters as sons. And it can't just be the difference between Royal and non-Royal, since Firebaugh is an Overlord rather than a King and therefore non-Royal.
How is it good, though? What does Olive stand to gain from it? Give up being chief caster of a huge, powerful, winning side whose leader listens to her, in exchange for becoming the chief caster of a tiny, losing side whose leader hates magic?
I think kagato is talking about Tommy's idea to destroy the Chillaxe, Aquillion.