Let me introduce you to the real lure latios :
Latios (M) @ Choice Specs
Ability: Levitate
EVs: 4 Def / 252 SpA / 252 Spe
Timid Nature
IVs: 0 Atk
- Draco Meteor
- Psyshock
- Thunderbolt / Surf
- Hidden Power [Fighting] / Hidden Power [Fire]
The aim of this set is to remove it's own counters (Namely Ttar, Chansey, Skarm and Clef) and then obliterate everything left with a Specs Draco
*First, in every game i playtested it has succesfully lured opposing TTars, LO is enough to 2hko Band Tar if you want to run roost over Tbolt to be able to reliably check Keldeo, Specs have the added advantage to even 2HKO support Ttar and leave you untouched :
252 SpA Choice Specs Latios Hidden Power Fighting vs. 248 HP / 180 SpD Tyranitar in Sand: 224-264 (55.5 - 65.5%) -- guaranteed 2HKO after Leftovers recovery
I think Specs also help in the sense that if your gonna run 4 attacks, LO will put you in some unfavorable situations due to it's recoil. Especially since Latios, even lacking roost, can be used as a check to Keldeo wich often put it at around 40% quite early in the match, being basically on a timer due to LO would quite suck
*But the number one reason to run specs is definetely Chansey :
252 SpA Choice Specs Latios Psyshock vs. 4 HP / 252+ Def Eviolite Chansey: 261-307 (40.6 - 47.8%) -- 59% chance to 2HKO after Stealth Rock
Because of it's lack of recovery it's super easy to put chansey in the range of a guaranteed 2HKO, even the weakest volt switch will do the job if you have rocks up
Clef is a quite similar case if it runs a regular calm mind set :
252 SpA Choice Specs Latios Psyshock vs. 252 HP / 172 Def Clefable: 205-243 (52 - 61.6%) -- 97.7% chance to 2HKO after Leftovers recovery
Max defense Clef is a bit trickier :
252 SpA Choice Specs Latios Psyshock vs. 252 HP / 252+ Def Clefable: 172-204 (43.6 - 51.7%) -- guaranteed 3HKO after Leftovers recovery
Knock off support and volt switch support are probably your best tools to put Clef in range there (On my team, Knock Off Mamo and Toxic Zapdos fill this role)
Pairing Latios with a Kyu-B to form a dragon spam core might also be an idea since LO KyuB beat full physDef Clef
*Tbolt is mainly here to lure skarm wich would otherwise completely wall you but also provides a nice neutral hit in late game situations where clicking other attacks would be a 50/50 between killing the mon you are trying to revenge and 2HKOing a potential switch in
Useless calc : 252 SpA Choice Specs Latios Thunderbolt vs. 252 HP / 252+ SpD Skarmory: 266-314 (79.6 - 94%) -- guaranteed 2HKO after Leftovers recovery
It's also your best move to hit steel types, it actually almost always 2HKOs MMetagross if your opponent bring it non evolved on the first Tbolt, wich is quite importent considering Metagros-M can be used as a pursuit trapper :
252 SpA Choice Specs Latios Thunderbolt vs. 0 HP / 0 SpD Metagross: 161-190 (53.4 - 63.1%) -- guaranteed 2HKO
252 SpA Choice Specs Latios Thunderbolt vs. 0 HP / 0 SpD Mega Metagross: 136-160 (45.1 - 53.1%) -- 30.5% chance to 2HKO
252 SpA Choice Specs Latios Thunderbolt vs. 248 HP / 8 SpD Scizor: 175-207 (51 - 60.3%) -- guaranteed 2HKO
Surf can be used instead of Tbolt, with rocks up it's still quite easy to 2HKO Skarm :
252 SpA Choice Specs Latios Draco Meteor vs. 252 HP / 252+ SpD Skarmory: 144-169 (43.1 - 50.5%) -- 47.7% chance to 2HKO after Stealth Rock and Leftovers recovery
Surf 2HKOes SpDef Exca and SpDef Heatran, HP fight is already a 2HKO on offensive tran tho
The choice really depend on what move bring the most favorable middle plays to your taste : Tbolt is nice because it RK Keld while threatening a whole range of potential switch ins like TornT and Azu adn still hits those steel types
Surf tho allows you to 2HKO most Ttars thanks to specs
252 SpA Choice Specs Latios Surf vs. 100 HP / 0 SpD Tyranitar in Sand: 196-232 (53.5 - 63.3%) -- guaranteed 2HKO
It also allows you to run HP Fire But this would leave an opening for the TTar+Volcanion Combo (Ttar soak one surf then it's a 50/50 between pursuiting or bringing Volcanion to wallbreak) HP Fight also prevent Bisharp at 100% to come in for 50/50 between Pursuit or Sucker Punch
So it really depend on your Team Comp i think ;) I usually preffer to run Tbolt because i often carry very hard ground type counters on my teams (Zapdos/Skarm) and quite meh water checks (Specs Latios ^^) but that's a team building preference ;)
(Will edit with replays)