Alright /vp/, I'm going to preface this by saying that I am absolute shit at competitive; the highest rating I ever got on the OU Ladder was 1400 and some change, and that was a while ago.

Now that ORAS OU is a thing, I want to try to make a somewhat viable team, and for that, I need a little help.

So far, I have this:

Landorus-Therian (M) @ Leftovers
Ability: Intimidate
EVs: 252 HP / 252 Atk / 4 SpD
Adamant Nature
- U-turn
- Earthquake
- Knock Off
- Stone Edge

Rotom-Wash @ Leftovers
Ability: Levitate
EVs: 252 HP / 252 SpD / 4 Spe
Calm Nature
- Pain Split
- Volt Switch
- Hydro Pump
- Hidden Power [Ice]

Tyranitar @ Assault Vest
Ability: Sand Stream
EVs: 252 HP / 144 Atk / 112 SpD
Adamant Nature
- Pursuit
- Crunch
- Stone Edge
- Earthquake

I'm thinking of using Gallade for my Mega, but I don't know what to run on it. I'm open to suggestions that are not MegaMence in that regard.

Aside from that, please /vp/,give me some advice on the rest of my team. I don't need to be amazing, I just want to bat at least 400.