Deoxys-Attack @ Focus Sash  
Ability: Pressure  
EVs: 4 Def / 252 SpA / 252 Spe  
Timid Nature  
IVs: 0 Atk  
- Icy Wind  
- Psycho Boost  
- Shadow Ball  
- Spikes  

Kyogre @ Choice Scarf  
Ability: Drizzle  
EVs: 252 SpA / 4 SpD / 252 Spe  
Modest Nature  
IVs: 0 Atk  
- Water Spout  
- Surf  
- Thunder  
- Ice Beam  

Latios (M) @ Soul Dew  
Ability: Levitate  
EVs: 4 HP / 252 SpA / 252 Spe  
Timid Nature  
IVs: 0 Atk  
- Draco Meteor  
- Thunder  
- Surf  
- Recover  

Giratina-Origin @ Griseous Orb  
Ability: Levitate  
EVs: 252 Atk / 56 Def / 200 Spe  
Jolly Nature  
- Outrage  
- Earthquake  
- Shadow Sneak  
- Will-O-Wisp  

Mewtwo @ Leftovers  
Ability: Pressure  
EVs: 252 HP / 28 Def / 228 Spe  
Timid Nature  
IVs: 0 Atk  
- Ice Beam  
- Thunder  
- Calm Mind  
- Recover  

big poppa (Empoleon) @ Custap Berry  
Ability: Torrent  
EVs: 252 HP / 48 SpA / 208 SpD  
Modest Nature  
- Surf  
- Ice Beam  
- Knock Off  
- Stealth Rock  

here's another offensive rain team where im frustrated with the inherent flaws of steel choice and try to branch out for a solution. I landed on custap emp bc he gives a decent 1 time answer to latis, palkia, and most dialga who also sets SR. pretty good utility there if i do say so myself. plus knock is just so sweet at getting chip against fat teams and opposing dialga. custap bc thunder alone or draco -> thunder will knock u into custap range after sr on all these mons (rend+tuhunder for palkia ofc, u still eat).

i really like rain latios, maybe even more than palkia on something like this. very good enabler for mewtwo when it chips steels and ttar. fast spike and antilead in deoa. dont like froslass bc tht bitch ass shit mon loses to darkrai leads. experimental icy wind set for maximal ~utility even lead mu spread. superpower is accetable tho.