Though I admit it's probably leaning more towards the defensive side. First thing's first, I haven't tested this yet. I'm posting it on here to smooth out any initial glaring weaknesses before I do so.
AT-A-GLANCE
Deoxys-D@Leftovers
Bold nature
252 HP/ 252 Def/ 6 SpD
Recover
Seismic Toss
Stealth Rock
Spikes
Deoxy-D gets up initial hazard and is most likely to survive until later in the battles with those defences. Moves are pretty self-explanatory.
Gligar@Eviolite
Bold nature
252 HP/ 252 Def/ 6 SpD
Roost
Toxic
Substitute
Earthquake
Straight physical wall to stall out opponent.
Mismagius@Leftovers
Timid nature
252 HP/ 252 Spe/ 6 SpA
Will ‘O’ Wisp
Pain Split
Shadow Ball
Hidden Power Flying
Mismagius is, imo, the single best fighting type counter in the tier and absolutely necessary, what with Heracross, Cobalion and Machamp running rampant. She switches in on the DynamicPunch/ Close Combat and cripples with Will 'O' Wisp. And before you say anything about HP Flying...bear in mind that Mismagius is specifically a fighting type counter and I can't hit any fighting types with only Shadow Ball. HP Flying is preferred over Psychic for Hera.
Heracross@Choice Scarf
Adamant nature
252 Atk/ 252 Spe/ 6 Def
Megahorn
Close Combat
Stone Edge
Pursuit
Switched Machamp for Heracross for the extra speed and offensive presence.
Suicune@Leftovers
Calm nature
252 HP/ 6 SpD/ 252 SpD
Rest
Sleep Talk
Scald
Calm Mind
Good ole CroCune. Specially defensive variant since I'm in need of some Special Defence investment and Suicune often finds itself the target of Roserade and Raikou all the world over. Nothing else needs saying, I don't think.
Raikou@Choice Scarf
Rash nature
252 SpA/ 6 SpD/ 252 Spe
Thunderbolt
Aura Sphere
Hidden Power Ice
Volt Switch
Wrecks things and counters bulky waters. 'Cause I can. (Rash reduces speed drastically but increased Special Attack, so I switched to Scarf)
AT-A-GLANCE







Deoxys-D@Leftovers
Bold nature
252 HP/ 252 Def/ 6 SpD
Recover
Seismic Toss
Stealth Rock
Spikes
Deoxy-D gets up initial hazard and is most likely to survive until later in the battles with those defences. Moves are pretty self-explanatory.

Gligar@Eviolite
Bold nature
252 HP/ 252 Def/ 6 SpD
Roost
Toxic
Substitute
Earthquake
Straight physical wall to stall out opponent.

Mismagius@Leftovers
Timid nature
252 HP/ 252 Spe/ 6 SpA
Will ‘O’ Wisp
Pain Split
Shadow Ball
Hidden Power Flying
Mismagius is, imo, the single best fighting type counter in the tier and absolutely necessary, what with Heracross, Cobalion and Machamp running rampant. She switches in on the DynamicPunch/ Close Combat and cripples with Will 'O' Wisp. And before you say anything about HP Flying...bear in mind that Mismagius is specifically a fighting type counter and I can't hit any fighting types with only Shadow Ball. HP Flying is preferred over Psychic for Hera.

Heracross@Choice Scarf
Adamant nature
252 Atk/ 252 Spe/ 6 Def
Megahorn
Close Combat
Stone Edge
Pursuit
Switched Machamp for Heracross for the extra speed and offensive presence.

Suicune@Leftovers
Calm nature
252 HP/ 6 SpD/ 252 SpD
Rest
Sleep Talk
Scald
Calm Mind
Good ole CroCune. Specially defensive variant since I'm in need of some Special Defence investment and Suicune often finds itself the target of Roserade and Raikou all the world over. Nothing else needs saying, I don't think.

Raikou@Choice Scarf
Rash nature
252 SpA/ 6 SpD/ 252 Spe
Thunderbolt
Aura Sphere
Hidden Power Ice
Volt Switch
Wrecks things and counters bulky waters. 'Cause I can. (Rash reduces speed drastically but increased Special Attack, so I switched to Scarf)