Ok, this is my 2nd team build and I basically got sick of getting owned with my first team. So I decided to make a team that revolves more around an offensive strategy and this is what I've come up with.
Swampert@Leftovers
Impish
Torrent
252Hp/ 252Dff/ 6Sdff
~Earthquake
~Roar
~Stealth Rock
~Avalanche
I picked Swampert as my lead because he will almost never be OHKO and can set up stealth rock. Roserade leads pose a huge threat for Swampert and I'd definantly have to switch into someone else but I haven't come across too many so far. Avalanche packs a big punch for Taunt lead Aerodactyl and since Swampert almost never gets to attack first he can come back with a huge punch. Roar is another one of Swampert's moves that I love, set up stealth rock and roar away the opponent into stealth rock is great. Swampert is by far my favorite lead I've tried so far.
Gyarados@Leftovers
Adamant
Intimidate
154Hp/ 176Atk/ 36Dff/ 144Spd
~Earthquake
~Ice Fang
~Dragon Dance
~Waterfall
Gyarados provides bulk and type coverage against ground attacks aimed at Tyranitar, Dragon type pokemon such as latias and if set up correctly can take out Gliscor with no problem. Dragon Dance + 144 Speed EVs sets me up to a 353 speed stat which outruns most Pokemon that aren't scarfed. I picked Ice Fang over Stone Edge because Tyranitar already knows Stone Edge and I needed a pokemon with a powerful Ice move and since Swampert has pretty low attack, Gyarados is perfect for this roll.
Electivire@Life Orb
Adamant
Motor Drive
252Atk/ 252Spd/ 6Hp
~Fire Punch
~Thunderpunch
~Cross Chop
~Taunt
Electivire is my Blissey killer, I can taunt Blissey and usually 2HKO with Cross Chop, also Electivire is a great switch in when Gyarados becomes the helpless target of an electric attack. Fire punch helps take out Scizor, Magnazone and Fortress who would usually lawl at the rest of my pokemon.
Tyranitar@Choice Scarf
Adamant
Sandstream
252Atk/ 100Hp/ 100Spd/ 58Dff
~Earthquake
~Crunch
~Stone Edge
~Aqua Tail
Tyranitar is my revenge killer, fast due to choice scarg and with a good type coverage Tyranitar takes out almost everything in one hit. The EVs as of now are not what I want, I'm going to take out all the defense EVs and put it all into speed because I didn't want to sacrafice any of his HP. Tyranitar is weak againt many pokemon adding to my grass weakness which is only taken care of by Scizor. And getting hit with a Fighting Attack would destroy him but thanks to Gengar switch it usually do his job and switch out. The moveset on Tyranitar is good unfortunately I did not breed for pursuit and had to settle with STAB crunch witch is pretty effective. Aqua Tail was just a move that I picked for the 90 power but I think I want fire punch for better type coverage.
Gengar@Choice Specs
Timid
Levitate
252Spd/ 252Satk/ 6Hp
~Energy Ball
~Thunderbolt
~Focus Blast
~Shadow Ball
I love Gengar as a quick and powerful hitter, switches out and decimates the other Pokemon and Pokemon who are usually tanks, Thunderbolt OHKOs many Suicune and has even OHKO a few Vaporeon. I love Energy Ball on Gengar since none of my other Pokemon know a grass attack which is a good counter for unexpected Swamperts and other Water/Ground types. When Focus blast doesnt miss it can take out 2 or more unexpected opponents.
Scizor@Life Orb
Adamant
Technician
252Atk/ 16Spd/ 100Hp/ 100Sdff/ 42Dff
~Swords Dance
~Bullet Punch
~Pursuit
~Super Power
The sweeper. If I can set up for Swords Dance, bullet punch becomes my main choice of attack, I had vacuum wave on Scizor at first because it always attacks first which can come in handy but rarely OHKOs.

Swampert@Leftovers
Impish
Torrent
252Hp/ 252Dff/ 6Sdff
~Earthquake
~Roar
~Stealth Rock
~Avalanche
I picked Swampert as my lead because he will almost never be OHKO and can set up stealth rock. Roserade leads pose a huge threat for Swampert and I'd definantly have to switch into someone else but I haven't come across too many so far. Avalanche packs a big punch for Taunt lead Aerodactyl and since Swampert almost never gets to attack first he can come back with a huge punch. Roar is another one of Swampert's moves that I love, set up stealth rock and roar away the opponent into stealth rock is great. Swampert is by far my favorite lead I've tried so far.

Gyarados@Leftovers
Adamant
Intimidate
154Hp/ 176Atk/ 36Dff/ 144Spd
~Earthquake
~Ice Fang
~Dragon Dance
~Waterfall
Gyarados provides bulk and type coverage against ground attacks aimed at Tyranitar, Dragon type pokemon such as latias and if set up correctly can take out Gliscor with no problem. Dragon Dance + 144 Speed EVs sets me up to a 353 speed stat which outruns most Pokemon that aren't scarfed. I picked Ice Fang over Stone Edge because Tyranitar already knows Stone Edge and I needed a pokemon with a powerful Ice move and since Swampert has pretty low attack, Gyarados is perfect for this roll.

Electivire@Life Orb
Adamant
Motor Drive
252Atk/ 252Spd/ 6Hp
~Fire Punch
~Thunderpunch
~Cross Chop
~Taunt
Electivire is my Blissey killer, I can taunt Blissey and usually 2HKO with Cross Chop, also Electivire is a great switch in when Gyarados becomes the helpless target of an electric attack. Fire punch helps take out Scizor, Magnazone and Fortress who would usually lawl at the rest of my pokemon.

Tyranitar@Choice Scarf
Adamant
Sandstream
252Atk/ 100Hp/ 100Spd/ 58Dff
~Earthquake
~Crunch
~Stone Edge
~Aqua Tail
Tyranitar is my revenge killer, fast due to choice scarg and with a good type coverage Tyranitar takes out almost everything in one hit. The EVs as of now are not what I want, I'm going to take out all the defense EVs and put it all into speed because I didn't want to sacrafice any of his HP. Tyranitar is weak againt many pokemon adding to my grass weakness which is only taken care of by Scizor. And getting hit with a Fighting Attack would destroy him but thanks to Gengar switch it usually do his job and switch out. The moveset on Tyranitar is good unfortunately I did not breed for pursuit and had to settle with STAB crunch witch is pretty effective. Aqua Tail was just a move that I picked for the 90 power but I think I want fire punch for better type coverage.

Gengar@Choice Specs
Timid
Levitate
252Spd/ 252Satk/ 6Hp
~Energy Ball
~Thunderbolt
~Focus Blast
~Shadow Ball
I love Gengar as a quick and powerful hitter, switches out and decimates the other Pokemon and Pokemon who are usually tanks, Thunderbolt OHKOs many Suicune and has even OHKO a few Vaporeon. I love Energy Ball on Gengar since none of my other Pokemon know a grass attack which is a good counter for unexpected Swamperts and other Water/Ground types. When Focus blast doesnt miss it can take out 2 or more unexpected opponents.

Scizor@Life Orb
Adamant
Technician
252Atk/ 16Spd/ 100Hp/ 100Sdff/ 42Dff
~Swords Dance
~Bullet Punch
~Pursuit
~Super Power
The sweeper. If I can set up for Swords Dance, bullet punch becomes my main choice of attack, I had vacuum wave on Scizor at first because it always attacks first which can come in handy but rarely OHKOs.