Of course each order will get it's prestige class, and I agree with Parn being a fighter, but what about those like Spark, who is too much unlike a mercenary to still be in the fighter class, but hasn't become a true knight yet. I am thinking the Samurai class from OA(Tweaked a bit so dishonor is not given to those who lose their swords, and they can start with a new sword, and can only upgrade one blade, and a different code of honor), as both it and the fighter class are battle specialists, but the Samurai of OA, like Lodossian knights, have powerful weapons at high levels, that are rarely changed, and represent higher-ranking and lawful members of society, from powerful families, with a code of honor, and exist alongside the fighter class, which is used for mercenaries.