Whoa, slow down. I'm kinda puzzled myself about what you wanna know. I assume, you want to know a combination of units that can't be countered by anything? Like DeathandPain said, there isn't reallly a foolproof combination of units, or otherwise everyone would be using that combination.
However, there are certain combinations that have very little resistance at certain times. For example, my
Nemean Rex/Hypaspists combination against Atlanteans that I've been preaching on about in several threads.
As you can see, there isn't really an effiecient counter against it until the Mythic Age, where the Fanatics, come to play, but still, you can create Hade's Gastraphetes to counter them.
So really, there is no 'perfect' unit, that counters everything( except maybe Gaia herself or Osiris) at all. That's what Makes AOM TT fun. You have to change your tactics and units to wipe away your enemies, and they have to do the same. How boring would it be, to just have 1 perfect unit everyone uses, that has no counter?