[ORAS] Help for trick room team?

[JacobMansapit]

Obviously from the title you already know.
I've been working on a trick room team and I'm starting to have a hard time deciding what pokemons to use. I need some help & recommended Pokemon I should use.
Is two trick room setters good? What can back them up and stuff like that?
So far I have four Pokemon down that I like.

Cresselia @ mental herb
Ability levitate
Relaxed nature
Evs
236HP/204Def/70SpD

Moves:
Psyshock
Helping hand
Ice beam
Trick room


Heatran @ shuca berry
Ability flash fire
Quiet nature
Evs
180HP/252SpA/78SpD

Moves:
Heat wave
Earth power
Flash cannon
Protect


Mawile @ mawilite
Ability intimidate
Adamant nature
Evs
252HP/252Atk/6Spd

Moves:
Sucker punch
Play rough
Rock slide
Protect


Hariyama @ assault vest
Ability thick fat
Adamant nature
Evs
252Atk/6Def/252SpD

Moves:
Close combat
Knock off
Bullet punch
Fake out

That's about it, please help me out really wanna use this team.