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specs tinted lens is incredibly hard to switch into but is an arguably worse set than the standard speed boost one.
Yanmega @ Choice Specs
Ability: Tinted Lens
EVs: 4 Def / 252 SpA / 252 Spe
Modest Nature
- Bug Buzz
- Air Slash
- Giga Drain/Hidden Power Ground
- U-turn
252+ SpA Choice Specs Tinted Lens Yanmega Bug Buzz vs. 0 HP / 0 SpD Talonflame: 152-178 (51.1 - 59.9%) -- guaranteed 2HKO
compound eyes is a good ability for pokemon that may rely on high-power/low-accuracy moves, like galvantula (thunder) and vivillon (hurricane).
(a compound eyes yanma will turn into a tinted lens yanmega, if that's also what you're asking)