Nerds Drow Ranger
Drow Ranger is agility core hero who excells at farming with insane speed and getting out of control. The hero has good surviveability toolset, but lacks mobilty, but doesn't need much damage in return.
Main strategy of playing Drow Ranger is based on getting ultimate as soon as possible and then switch to clearing jungle. First early to mid game items are usually Blink Dagger and Hurricane Pike that will provide a lot of mobility. Another thing to keep in mind is level 25 talent that provides 50% cooldown reduction, essentially making any active items have more priority.
Skill Build Timeline
Other significant items
+15 Frost Arrow Damage
Can be pretty good choice when you use it in combiation with Pike and Blink (get in, gust opponent to your team, pike away) or when you just want to keep your distance
Main mobility and farming tool. Get it if you're going to play agressively around pickoffs
Even while Drow wants attack speed more than damage, getting additional agility for such a cheap price is way too valuable for her
Stack as much of Wraith Bands as you possibly can, saving a slot for boots and blink. This will allow you to keep on moving during early game
If you want to go all-in for farming and can get it relatively early, it may be good purchase. Altho, getting Blink Dagger is still your first priority, so you need to fit it in somewhere between Blink and Manta
More of an offensive choice if you want to boost your damage significantly
Getting casual Yasha and upgrading it into Manta Style will help you with mobility, while also providing a lot of agility, boosting your farming speed even more
It may be a good farming item for Drow, increasing attack speed and mobility, but in most scenarios getting more traditional items is better
Can be useful for repositioning if you feel like you need a bit more surviveability. Nice bonus - at level 25 you can be permanently invisible