Enchantress help.

I really like playing enchantress. I've played her in lane 2 games, and maybe 4 games in the jungle. Where does she belong? What is she best at? Some of my games I am 19-2, or 10-5. I try to get A. scepter to add the range to my ult. Is she support only? Can she carry? Is she an all around? Should she buy courier at lvl 1 instead of items?