Dark Type Team Help

Hey!

My favorite type is dark and i want an all dark team for battling.

This is my team so far

Zoroark- 1st position to trick the enemy
Weavile- super fast and high attack
Tyranitar- power house
Hydreigon- All around great and cool looking
Umbreon- amazing defense and health
Spiritomb- no weaknesses

I want to know what items to use as well as what evs to give who, and what move sets would let these 6 work well together.

Thanks ahead of time!

I'll move this to the main forum considering you mentioned details like EVs and that it's for battling. Keep in mind you must now edit your team with abilities, natures, EVs, and movesets. You can find viable movesets on Smogon, and change them if you want.