I'm leaning towards Speed Boost, but I am kind of unsure of how Colored Glasses work.
i use this as a lead:
megayanma @ focus sash
modest
252 spat. 252 speed 4 hp
tinted lens
ms:
hypnosis
air slash
bug buzz
psychic
u could go with giga drain for swampert but i like psychic for gengar or crobat..
this set worked surprisingly well.. people sometimes dont see a hypnosis or a boosted attack coming
Yanmega @ Life Orb
Modest Nature
252 Sp. Atk, 204 Spd, 51 HP
Speed Boost
-Protect
-Bug Buzz
-Air Slash
-HP Ice
This Yanmega is the Anti-lead lead, if that makes any sense. Protect once with that exact speed EV to outspeed C.Scarf Hera. Air Slash is OHKO on Hera and Infernape, Buz Buzz is OHKO on Weavile, and HP Ice is OHKO on Garchomp, Salamence, and Dragonite.