I'm going to make some suggestions to seriously improve your team (hopefully)
Reuniclus: I don't know what you are doing giving him speed EVs, but I think you'll find that giving him bulk makes him much more effective. This set works WONDERS for me.
Reuniclus @Life Orb
Trait: Magic Guard
EVs: 252 HP/ 252 Def/ 4 SpA
Nature: Bold (+Def, -Atk)
-Calm Mind
-Recover
-Psyshock
-Shadow Ball
With magic guard, this guy cannot be stalled, which makes him a wonderful tank. With max defense he can take numerous hits, and even Super Effective hits in the OU tier. Once he has calm minds up, he can be very tankish, and tear through a team with nothing to hurt him. The set works-- believe me.
Gliscor: I cannot say that I'm a huge gliscor expert, but there are still some things to be said. It looks like you're going for the Bulky Sub Swords dance type, which is fine. HOWEVER, HP investment gives pokemon more overall bulk than Def or SpD. So, I'd keep the set, but give this guy a 252 HP/ 188 Atk/ 68 Def spread. That should give'm more bulk.
Tentacruel: Umm, let's try him again and I'll explain.
Tentacruel @ Black Sludge
Trait: Liquid Ooze
EVs: 252 HP/ 188 Def/ 68 SpD
Nature: Bold (+Def, -Atk)
-Toxic Spikes
-Rapid Spin
-Scald
-Ice Beam
Alright, Tentacruel is used most effectively as a T-Spikes/Rapid Spin/Staller in OU. You're going to want to give him more bulk and Def, and Ice Beam instead of Sludge bomb, being that though you don't get STAB, you get better coverage and threaten the D-Dancing pokes that will want to set up on you while you get up your spikes. If you want a special wall Toxic Staller, I suggest blissey or chansey.
Infernape: He looks good, but Infernape is really meant to be a mixed attacker. Therefore, (don't worry you don't have to change much) I suggest giving him a Naive Nature, and replacing Fire Punch with overheat. This way you'll be able to destroy with overheat and not be forced to switch out due to stat loss. Everything else looks awesome.
Latios: Ok, so I see you're going for the Calm minding set. Well, for Calm Mind you need some bulk, and you gave him some. HOWEVER, there's a relative of his that has MORE natural bulk, and you can spend your Effort values on more HP or Speed. Here, is
Latias @ Leftovers
Trait: Levitate
EVs: 252 HP/ 252 SpA/ 4 Def
Nature: Modest (+SpA, -Atk)
-HP fire
-Calm Mind
-Psyshock
-Dragon Pulse
Alright, this guy is worth it. Trust me, he abuses calm mind so much better. I pondered whether to give him HP fire, but then I thought you were right, physical Abamosnow is a threat along with scizor, and now you can take out Genesect, Ferrothorn, and Forretress. If you really REALLY just NEED to have Latios, you should go with a Hit and Run destruction set.
Latios @ Life Orb
Trait: Levitate
EVs: 252 SpA/ 252 Spe/ 4 HP
Nature: Modest (+SpA, -Atk)
-Draco Meteor
-Psyshock
-Thunderbolt
-Ice Beam
This guy comes in, destroys everything with draco meteor, and leaves. His Draco meteor HURTS. When I say hurts I mean it can 1HKO, well, LOTS of things. So strong.
Genesect: He looks awesome, like all scarfed genesects. You were right to give him Rash so he can take fighting moves and an EQ, (not like he'll be taking any fire type moves anyway) You might want to consider swapping Flamethrower for a STAB bug buzz, for pure power. Just a suggestion, he's pretty nice.
I hope my suggestions were sensible. Good luck in the OverUsed tier.
Let me know what you think... Give me feedback on how stuff works too.