Defensive
~ missing ability: Poison Heal
~ Your EV spread and descriptions do not match the EV spread. Elaborate that with this defensive spread, it gives Gliscor maximum defensive capacity while being faster than max Spe Adamant Scizor. With this spread, it survives a +2 Rock Gem Stone Edge from Terrakion almost all the time (94%).
Typing provides handy immunities to Electric and Ground type attacks, as well as resistances to Fighting and Bug.
~ Add that its dual typing provides a neutrality to Rock, which is amazing when paired with resistances of Flying types.
AcroBat
~ Adamant first; Jolly second - it needs the power; plus your damage calcs are for Adamant Gliscor -_-
~ ability: Hyper Cutter / Poison Heal - Hyper Cutter is much less circumstantial and much more consistent; it'll certainly help when facing Landorus-T and even Intimidate Gliscor. Substitute blocks status anyways.
~ For calcs of Rotom-W use either the new bulky attacker spread (184 HP / 4 Def) or the specially-defensive set (max HP)
~ Remove Milotic and Porygon2 calc smh; this aint UU. Use more relevant calc like against Landorus-T (+2 thanks to Hyper Cutter), Hippowdon, Hydration Vaporeon, and Bulky Gyarados (again +2 thanks to Hyper Cutter)
~ Offer teammates that can switch into or set-up on Water- and Ice-type assaults. Pokemon like Keldeo is particularly dangerous.
SubPass
~ like the Substitute set change the spread to
244 HP / 28 Def / 236 Spe; HP EVs make sure that Gliscor heals all health lost from Substitute after two turns
~ missing ability: Poison Heal
~ Be consistent and use Agility > Rock Polish on the fourth slot
~ Remove Facade mention
Skarmory and Bronzong are huge threats to this set- Skarmory resists both coverage moves, is immune to Toxic, and can Whirlwind away the passed Substitutes. Watch out for taunt
Rephrase the part in red - "Gliscor with Taunt can successfully baton pass without being phazed, though"
Nearly anything that can outspeed, take a hit, and break the Sub can counter this set's function. Lati@s, Tornadus and Thundurus-T, and Genesect are all prime examples.
Remove Genesect / include Gengar; add that these fast threats (except Gengar) wont enjoy Toxic.
Checks and Counters
~ Gengar - immune to EQ and Toxic; warn readers about Acrobatics
~ Fast Taunt users, such as Sableye, Tornadus-I and Therian, and Aerodactyl
~ Rotom-W
~ Xatu cannot be poisoned
~ Tangrowth / Amoonguss
Bulky water types do a nice job- but many do not appreciate toxic
Special mention Hydration Vaporeon
Bronzong and Skarmory top the list by resisting all common moves and being able to beat it with either HP ice or Whirlwind
Mention Air Balloon Heatran here, which many Gliscor with Toxic cannot touch
Most Ice types can beat Gliscor- Cloyster can Icicle Spear past Substitutes, Mamoswine can Ice Shard/Crash/Spear, and Froslass can Taunt and then Ice Beam.
Replace Froslass with something more relevant like Abomasnow / Kyurem-B