Hey Skull candy,
You have a pretty nice team nothing pretty much wrong with it.
Gliscor: Looks fine, But how do you know how much EVs are put in into metagross? how about if it has a Shuca berry? You didn't really explain if those were types of options were available. By the way, 92 speed EVs bring you to 273 Speed, also, 94 Speed EVs don't really do much because you're wasting 2 EVs. The other part is that Heatran which has the speed of 279 outspeeds you, which could be one hell of a problem of you getting KO'd way more easily. So my fix to this is pretty easy. Change the EVs to 252 HP / 216 Spd / 40 Def. The other thing is that I don't see much use for Stone Edge so you might want to either switch it into Taunt or U-Turn for things that can't get hit by Earthquake or Taunt if you really are in a mood to stop things setting up really, bad my opinon of what you should change it to due to your team is taunt. Last thing, change Gliscor into Sand veil so you can have a change taking on a sandstorm team and getting lucky since you don't need hyper cutter because you're not going to be sweeping and most leads don't carry intimidate.
Starmie: The EVs you definitly have to change I don't really know why you would put HP EVs to starmie since, you already have Life orb it isn't really gonna do much and just add the suicide rate for your starmie to how easily it can get killed by scarfedtar easily, what you might want to change though is make your starmie a rapid spinner set. So here's the moveset and the EVs you should be using at the bottom it'll have a better rate of surviving since it's bulky and it'll just fit the even more better with your team.
Starmie @ Leftovers
136 HP / 156 Def / 216 Spe
Moveset: Surf, Thunderbolt, Rapid Spin, Recover
Takes easy care of infernape, which could be a bit of a problem, also takes care of gyarados pretty much can take one pursuit from T-tar so I think you'll be fine.
Jolteon: It's ability helps this team a little bit, but overall it's stats aren't helping your team at all since all of your pokes pretty much are bulky sweepers. So what I think can be a way better Sp.attacking sweeper which fits your team perfectly is Jirachi, it will be able to switch out to Gyarados easily, and Gyarados and starmie won't have such a big problem since most Electric attackers are Sp.attackers unless it's Vire, which doesn't even hit that hard, so you'll be able to take most electric types with Blissey, and you already have Gliscor which isn't affected by electric type attacks. The other reason Jirachi will be doing a great amount of good to your team because it resists Ice attacks, Grass attacks, also it has 100 base Defense and Sp.Defense so it'll be able to take a lot of attacks fairly well. Here's the set I think you should be using.
Jirachi @ Leftovers
252 HP / 80 SpA / 176 Spe
Moveset: Flash Cannon, Thunderbolt, Calm Mind, Subsitute
Sweeps most of the time, sets pretty much explained it can hit anything in the OU metagame, but the only thing that resists its attacks is Swampert, but I think it'll be take care of since you have Blissey and Starmie.
Blissey: I don't really think you have to change anything for this pokemon.
Metagross: Since, I changed Starmie into not being a sweeper I think your team is ok now since you had....4 sweepers, so you don't need to change anything for this.
Gyarados: Lastly you have to change the item into Leftovers because you're not going to able to sweep since, you're going to be in rape if Sandstorm comes in or with SE setup. There's a lot of pokemon who can handle that set easily since you don't have Earthquake, Maybe Forry, Skarmory, Latias, Vaporeon, Suicune. Those are just some pokemon I am thinking in my head that can take any move you have with Life orb. So you might just want to change it into Leftovers because if you don't have too much to give up if you switch out.
Good luck to the team in the future and I think my analysis helped.
Message me if you want your team rated!
Thanks to Kinneas for the awesome avatar.