SO I have a pretty good build for a slayer that has been working out well for me so far.
Drow Slayer
Slayer ( 6 ) Sorcerer ( 1 ) Arcane Archer ( 3 )
Racial Traits : Darklands Stalker , Surface Infultrator
Spells : Gravity Bow, Enlarge Person , Abundant Arrows
This combination gives you a nice mix of archer/combat abilities that may be needed up close and at range. Makes you a decent archer, and using a greatsword with the ranger combat style of two handed fighting, taking shield of swings and Vital Strike.
All in all, I have a lot of fun with it.