Well, tailwind is neat (in Gen 5 it lasts 4 turns instead of 3 ;D). I'd suggest Modest 252 HP / 252 SAtk Tailwind, Aeroblast, Psychic, Protect maybe. For Latios I'd suggest Modest 252 SAtk / 252 SPd, Dragon Pulse, Thunder, HP Ground 70/Psychic/Whatever, Protect. Has worked for me. :)