[jc104]

IMO the specs set should look like this:

Draco Meteor
Surf
Psyshock / Hidden Power Fire
Trick

I think trick should be the only option in that last slot. This is because Trick is one of the main reasons to use specs on latios, rather than LO (a generally superior item). A ~15% power boost alone does not make up for having to use the wrong move half the time. I also moved surf above psyshock, because it's far more important. Surf offers good coverage, while Psyshock hits Blissey, mainly. Against chansey it doesn't do close to enough.

EQ sounds really awesome, I must say. I'm going to run a few more calcs to see what it can do, and to see whether a different spread/nature is in order.

edit: and yeah LO >>> Choice Scarf.

edit2: for LO as well, move Surf up one, slash Psyshock with HP Fire.