Synergy, my good sir. Not your game plan... which I will ask 'bout in more detail later.
Why Espeon ('sides playin' favorites)? If ya have a Rapid Spinner, Magic Bounce ain't all-that important to have... not that it's a bad idea. You can threaten the Magic Bounce and never have to risk bringin' Espeon in on somethin' like Mamoswine. If they out-predict ya, you've a spinner t' fall back on anyways. I just don't see what else it adds to the team.
Oh, and I forgot t' mention. E-speed on Mega Lucario can be used if only to give the finger to Talonflame. If ya ever feel like Talonflame is a huge threat to your team (lack of 'Rocks, and lack of Flying-type resistances says yesz, it is), it's worth considering. Bullet Punch is optimal otherwise, in particular for slappin' Ghost-types/Aerodactyl (... is Mega Aerodactyl any good?) with priority.