That doesn't sound very fair. But, I think it might just be possible if you are lucky enough.
Not quite. It's basically a reset storm. If on the first 4 chapters there is an enemy with Hammer and Hawkeye, you lost. Enemies with Counter will curse you the entire game, as when you less expect it, enemy reinforcements with Counter will appear and kill your units. Luna+ and Vantage+ will have you wishing for suicide most of the time, and lolPavise+ and lolAegis+ makes enemies harder to kill. Even more if they have both.
So yeah, you will have to reset a lot to get the enemies with less dangerous skill combos, and pray a lot for whatever god you have, because enemy reinforcements with Counter and Aegis+ are hilarious.
If you're reading this, CONGRATULATIONS!! You're wasting your time!!