Help with my team please

[Jericho]

So I edited my team for the last time, how bout this

Tyranitar: Ability - Sandstream, Nature - Sassy, Ev's - 252 HP, 76 Atk, 180 SP Def, Hold Item - Assult Vest
Stone Edge, Ice Beam, Crunch, pursuit 

Garchomp: Ability - Rough Skin - Nature - Naive, Ev's - 4 HP, 252 Atk, 252 Speed, Hold Item - Life Orb
Swords Dance, Earthquake, Dragon Claw, Fire Blast

Mega Scizor: Ability - Technician, Nature - Adamant, Ev's - 252 HP, 108 Atk, 148 Speed, Hold Item - Mega Stone
U-Turn, Defog, Bullet Punch, Roost

Keldeo: Ability -  Justified, Nature - Hasty, Ev's - 252 SP Atk, 4 SP Def, 252 Speed Hold Item - Choice Scarf
Hydro Pump, Secret Sword, Stone Edge, Taunt

Heatran: Ability - Flash Fire, Nature - Timid, Ev's - 252 SP Atk, 4 SP Def, 252 Speed, Hold Item - Groundium Z
Magma Storm, Earth Power, Toxic, Stealth Rock

Gengar: Ability - Cursed Body, Nature - Timid, Ev's - 100 HP, 156 SP Atk, 252 Speed Hold Item - Air Ballon
Shadow Ball, Sludge Bomb, Focus Blast, Destiny Bond

I will use the other evs that were mentioned above in any case. But I though speed to outspeed some of his threats for mega scizor