Regarding 3 -- Some abilities like Axe Throw don't specify how much damage (or even if it does damage). I also noticed my bow appeared to have a high chance to miss early on when there are fewer enemies -- is there a stat to improve the accuracy for it?
Good point, I'll have to add that. Just for your info: Axe Throw deals melee damage (STR + some random number between min and max attack) and no, dwarf archers are just really bad at aiming and you should only use them against many enemies.