Ad aspera

Am I understanding correctly that with my god, I can use Dash and other abilities during combat after Fury has been activated, but I just can't choose the target myself? The nearest target will be selected automatically, except for Whirlwind, which doesn't require this.

Yes.

How can ranged weapons work with this god? We stand side-by-side with Kotori, I throw an axe, it hits the enemy, then I turn around and give the axe to her in the chest?

Basically, yes. I could introduce a rule that the target cannot be switched during a turn, but why? Acer is already the strongest god, not counting Erusea, three times stronger than some Astaphan or Dreghich, so convenience and teamwork are not what he's about.

And lastly, can the Hammer skill be combined with the Cleave ability from the Northern branch? I don't see any reason why not, it will just result in a crushing effect instead of a cleaving one.

There was supposed to be a correction for the damage type, which was lost when the edited post didn't save again. It's not very fair right now, but I'll leave it as is. The Glory of Antaeus should remain unique.

Kyujutsu was designed for those who like to focus on accuracy, who didn't have enough luck in perception and don't like that the bow only has bonuses through rank, and not through long-term progression. And also, as written, it works with the bow's special ability, but not with the longbow. Because when Kyujutsu was designed, the longbow was a full-fledged special ability in the special skills.
But I will still adjust it.