Psyshock is a little overrated TBH. Yeah, it is ok but I would slash Dragon Pulse with it on the Specs set. Thunder WTF?!?! Thunder just.. no. Thunderbolt is better than Thunder if you want to use an Electric move but it doesn't help Latios any. You want Dragon Pulse for late game sweeping.
Also, I strongly suggest listing the cons of Hidden Power Fire. Losing the speed tie to Latias, other Latios, and Gengar is pretty significant and HP Fire isn't needed to Beat Scizor. Yes, it helps with Ferrothorn but you have teammates for that.
Also, it might be useful to list calculations on Tyranitar for both Life Orb and Choice Specs. Knowing the damage output on a Tyranitar that switches in and very useful to determine its spread and if it is safe to go for the kill or switch out so you don't get killed by Pursuit or a faster Scarfed Crunch.
ImStillGood (Salamence) (M) @ Life Orb
EVs: 252 SAtk / 252 Spd
Rash Nature (+SAtk, -SDef)
Draco Meteor / Flamethrower / Brick Break / Roost