Have you tried Demon Hunter Strafe Build before? This build mainly rely on strafe and Caltrops to fight with monsters. Let's see the core skills of the build at first.
Strafe – Demolition
Caltrops - Jagged Spikes
Preparation - Punishment
Shadow Power - Gloom
Passive skill: Night Stalker
The rest two active skills can be Rapid Fire and Companion (Bat Companion). Another two passive skills you can choose from Perfectionist, Numbing Traps, Hot Pursuit and Archery, which depends on personal preference. As the picture shows.
After pulling monsters, use Shadow Power – Gloom and Strafe – Demolition first to enter the monster group, then Caltrops - Jagged Spikes five times quickly. Before the end of Gloom, keep Jagged Spikes if the discipline still continues overflowing. When it’s over, it remains the ability of gaining 15% of all damage done as Life as long as Strafe is not interrupted. But before the next Gloom, Jagged Spikes don’t have the life gaining ability. You need not to stop Strafe if there are a lot of monsters and discipline is full. On this condition start Gloom again and enter the next combat recycle. In case Gloom and Strafe interrupted at the same time, start Gloom first to recycle.