Why Dorarities and not Ionilemia?
Because Cedros came to be the three fathers combined (Zios, Dorarities, and Praxix). During Cedros' pursuit of knowledge he was chastised by Ionilemia for seeking things that should not be sought (read: arcane things) and lacking the wisdom to see that. Cedros grew frustrated with his former patron, but that frustration quickly melted when Praxix whispered to Cedros the first words of true power--power over death itself. Praxix, who was admittedly rather bored (yep, that's his reason), thought it would be interesting to see how a mortal could cope with such knowledge. Cedros was able to read Praxix's records and go so far as alter them temporarily to bring back the dead into the world of the living. Praxix allowed this, again, out of curiosity.
Overtime Cedros grew more and more envious of Praxix's powers, something the God of Records predicted and prepared for. The knowledge Praxix gave Cedros also gave Cedros the ability to see when his own death would occur. Cedros knew that to know his own death would be foolish, but after a brush with death due to warfare with Vorexia and the Many (though Vorexia was 'defeated' as a result of Cedros and Aristomachos' efforts), Cedros grew fearful and looked. Strangely, though, Cedros saw only Praxix's death (the God did not bother to look up his own death because he never thought it a possibility) and the death of the other two Father Deities.
Cedros knew this would unsettle the cosmos and knew that he had to do something to prevent it. He abandoned the Arosian Empire's war on the snakemen of the west and desperately searched for the Many--the strange force he knew to be hostile towards the Arosian gods. The Many, however, found him first and came to him in the form of Ionilemia. In this guise the Many was able to convince Cedros that the other Immortals would be the ones to kill their Gods and that it was his duty to stop them. Cedros was reluctant to believe any of this, more so out of his enmity with Ionilemia for denying him knowledge/calling him a fool, but luckily for the Many right around that time Epicurus had grown mad enough to begin openly denouncing the Gods and gathering misotheists followers who sought a violent end to the Gods so mankind could reign supreme.
Cedros, thus, gathered his legion of death and brought them down on Epicurus, beginning the civil war (around that time the west was conquered by Aristomachos and Xanthus, the two were too far away to prevent Cedros and Epicurus' war). Aros was burnt down by Epicurus early in the war and was never rebuilt as each Immortal found support in one of the conquered provinces of the empire. The other Immortals turned against Cedros, decrying him as a madman and apostate for his tampering with death (they had tolerated it before because it had won them battles); Cedros likewise called them all godkillers. With all the Titans fighting against one another the Many was able to sneak into the godrealm and kill most of the deities. Cedros noticed this right at the last moment when he read the names of the gods on Praxix's records. He then entered the godrealm himself, done by freeing his mind from his mortal form via a suicidal ritual similar to one done by Vorexia in her last moments. Once in the heavens he was able to prevent the total annihilation of the Three Fathers by merging his mind with theirs, giving them the substance necessary to prevent them from dissolving into nothingness.
Over time he learns how to reform his mortal body, but it can only be done by drawing heavily upon the essence of one of the Three Fathers to the extent that they may posses him. Cedros considers this a decent payoff and reenters the mortal world right as Ichthyos' mud-curse is interrupted by Xanthus. Dorarities is enraged to see his avatar slaughtered and consumes Cedros' mind, causing him to disperse his form as he literally becomes all the seas and oceans of the world. A period of calamity begins as Cedros-Possessed swallows much of the world with the seas. The chaotic nature of waterways destabilizes the empire, causing it to crumble and further causing Xanthus to grow mad at seeing the empire fall. Cedros is able to convince Dorarities that the world is not his enemy, but Xanthus and Dorarities yields some of his control to allow Cedros to reform himself. However, right as Cedros becomes whole again Dorarities expends what's left of himself to possess Cedros once more in order to destroy Xanthus.
And that's the long answer why!
So we can't be a champion in the vein of Jason, Theseus, Odysseus, Perseus, etc. - and then also control a small warband as that champion? They weren't stupid...
I guess: What do you mean by stupid?
Right, two questions here.
1) Players
are champions in the vein of Jason, Theseus, Odysseus, Perseus, etc. Warfare in this NES would be rather Homeric in nature in that it's more or less centered around a few great men fighting against other few great men. However, you'll note that much of these mythical heroes were mythical
kings. Players are just a somewhat toned down version of these heroes--they are Perseus after he became the King of Mycenae, Odysseus after he returned to Ithaca. Their heroic days of awesome feats are a bit behind them and they are now focusing on ruling their kingdoms.
2) What I mean by stupid is just that: most beings in this setting, save for the players and some others, are inherently lesser beings due to the mud-curse. They lack the mental capacity to be trickster-heroes. Champions are only better than the rest because they realize that they are lacking something, not because they have that something. Most will try to regain that something by serving one of the players/untainted beings--it's a reverence akin to Christianity's reverence for Christ as the model for perfection. Others, however, may try to cut their losses, accept their fates, and rule as lesser kings. Though I guess that it would make for an interesting time to play as such a person.