Let me sum it up to you: His Spheres are nowhere near real spheres. Have you looked at a list of Greek Gods like I suggested? 
His ability to read minds is awfully close to breaking the "no omniscient" rule which was written in the introduction post. He is no god of Deceit or Lies, so being able to use illusions is unlikely. Same goes for unmatched intellect which, in and of itself, is something that sets off "Gary Stu" alarm bells immediately. He's intelligent, sure! But he's nowhere near the point where he's more intelligent than the rest, and to such a degree that the others envy him because of that. Not only is that just a sign of a bad character creator, but it's also godmodding because you're telling us what [i]our[/i] characters feel or think. 

So his understanding of physics, something that the gods can openly defy should they so desire, surpasses the other gods' understanding of it? Surpasses the understanding of the one who created said physics? With that ability/statement, you're setting your own character a step above Faust, the Creator. That's a huge no-no and is enough to have you character denied immediately. And again, he's not omniscient. How would he have learned every language there is without ever actually learning them? There is a reason for why Theá's speech is very formal and often gets a bit of an archaic twist. It's because she hasn't been on the Mortal Plane for thousands of years, and she's still trying to adapt. 

[quote]and just plain worshippers ready to die for their god should someone go against him.[/quote]
Why are they ready to die for him? Why does he have thousands? Where do they come from? Yes, Theá has roughly four thousand followers, but that comes as a result of her being a hunter, and travelling around the globe. She has interacted with many, many ponies, gryphons and more and gained followers from them. She's the fastest of the Gods and she is able to travel quickly enough to seek out so many and gain their loyalty in only three months. 

I don't have much of a problem with his Blessing, except that it's a bit much with "flawless memory".

His purpose... Do you have any idea how quickly he will get Bitch Slapped if someone like, say, Sweeper, Torrential, or Theá finds out that [i]that[/i] is his goal? I can't say it's wrong, but I'm just warning you here. Plus, his goals contradict. How can he be worshipped if everyone are mindless machines that work using only cold logic? 

[quote]Exiled: monks that felt an emotion, they are forced to fight as cannon fodder on the battle ground. They have their mouths stitched closed and their ears are torn off. They fight with crazed bravery to prove themselves worthy to stand by their god in the afterlife he promises them.[/quote]
Uh. Ouch. That's torture, plain and simple. You're a PROTECTOR of ponies. Do you have any idea how fast Faust would boot you to Oblivion if he did that? Faster than Theá can fly, and she breaks the sound barrier without effort. 

[quote]Knights: unicorns in heavy bronze armor,[/quote]
Is he [i]trying[/i] to get them killed? Sure, bronze is tougher than copper, but you usually use steel for armour. 

As for the rest of the units: Stick to what can be done in Equestria, not Steampunk stuff. Also, this isn't a RTS game with twenty different units pr faction, nor are we making our own factions. We are playing Gods with followers, and those followers are just normal ponies and not mechas or turrets, or crazed monks with mouths sewn shut. 

Try again, and please do what Dawn and I have said; Look through a list of greek gods, find something interesting and let that inspire your character, or make a mortal character. But before that, read the introduction posts, read the RP, and read our characters. Then make your own character, and when you look through it again after it's done (but before it's posted) rip it apart; find anything that, in the words of Dawnscroll, "sets off the hackles of everyone in the Rp." In other words, is he realistic? Is he interesting but not overpowered?