Stealthy Archer Build for Steam-punk Campaign?

[Th3N3xtGuy]

So the campaign is in a steampunk world. Guns are prevalent but loud and magic users scarce. The surface world was destroyed by a war between Gods and a Collective of powerful nation spearheaded by a small army of Demi-Gods. So the empire that it takes place in, built a massive city and civilization underground with a Dwarf Kingdom to the West, Drow Nation to the South and a underground sea to the East. My character lives in the capitol city but I want him to be a stealthy archer that uses a compound bow. I'm thinking of building it around range sneak attacks from rooftops and shadows. Any suggested builds for this unique situation?

I'm defiantly getting Darkstalker feat. So maybe a rogue/ranger with hell-breaker and some Assassin.

[Th3N3xtGuy]

Oh all supplement books are allowed.