Yeah, this kind of team is really common in top of OU ladder and exist for many mounths. (With the same core, Espeon-Vapoeron-Scolipede-Smeargle) But your team is unfortunely weaker :/
THREATS :
You haven't the combo Encore/Roar to counter Booster.
Mega-Scizor can rape all your team.
Taunt...