Double Team is banned from competitive play.
Very similar question: What is a good moveset for Umbreon
Note that Dig (or indeed, any other move that needs more than one turn to take effect) is a bad move, since your opponent can predict when it hits, and either use protect or switch to a type that's immune/ resistant.
A lot of people use Umbreon as a staller/ wall, since it has Wish, Moonlight and Heal Bell, but there are some good special attack suggestions on that thread that I linked.
Also, having physical and special moves in the same moveset is rarely a good idea.
Umbreon @ Leftovers
Ability: Synchronise
EVs: 252 HP, 252 Def, 4 Sp. Def
Nature: Bold
- Moonlight
- Toxic
- Foul Play/ Confuse Ray
- Heal Bell
That's usually the set I use for Umbreon in UU.
