Seems decently viable. First couple turns will be very crucial though. I.e. First turn Latias Role Plays while taking a hit, and 2nd turn unboosted Draco Meteor may not KO. After that, it would be at +2 SpA, but Draco Meteor can still only target one opponent. Might potentially be better to have a Dry Skin Toxicroak in the back to fake out after Spinda faints or switches as Latias uses Surf. Latias needs a wide Lens or something. Sash for Spinda obviously. EDIT: Maybe Spinda can Flash Latias to boost its Accuracy lol :P Of course.... Latias would have to move first still so the first DM will still be at 90%.