Instance troubles

[perin413]

Ok so I am trying to do instances. I have a 5 box team and trying to do instances and heroics. I can work through several instances but get destroyed in heriocs

My team is
Warrior GS 4900 Talent is prot
Shaman GS 4900 Talent is resto
Warlock GS 5000+ Talent is demon
Warlock GS 5000+ Talent is afflict
Mage GS 5000+ Talent is frost

I am using the glyphs as recommended by wowpopular.com

here is my problem. I used recount and my DPS was like 800 - 900 for the 3 DPS

here is my rotations ::

Warlock (afflict)
Seed of Corruption, Curse of Doom, Haunt, corruption, Immolate, Shadow Bolt, Unstable Affliction, Shadow Bolt, drain life, , Unstable Affliction, Shadow Bolt, Unstable Affliction, Shadow Bolt, drain life, , Unstable Affliction, Shadow Bolt, Haunt, corruption, curse of agony, Immolate, drain life, Incinerate, Shadow Bolt, Life Tap, Shadow Bolt, Corruption, incinerate, shadow bolt, Haunt, shadow bolt, shadow bolt,

Warlock (demon)
Seed of Corruption, curse of agony, Immolate, drain life, , Incinerate, Shadow Bolt, Life Tap, , curse of agony, Immolate, Shadow Bolt, Seed of Corruption, curse of agony, Immolate, shadow bolt, Immolate, Seed of Corruption, Curse of Doom, Demonic Empowerment, Fel Domination, Metamorphosis, Incinerate, Immolate, shadow bolt, Immolate, drain life, , ,

Mage
Ice Lance, Frostbolt, Ice Lance, Frostfire Bolt, Ice Lance,Frostfire Bolt, Ice Lance, Icy Veins, Frost Nova,, Cone of Cold ,Ice Lance, Frostfire Bolt, Frostbolt, Ice Lance,Deep Freeze, Cold Snap

fireball, icy veins, Frostbolt, ice lance, Frostfire Bolt, Arcane Blast, Arcane Blast, Firebal, Ice Lance, Deep Freeze, Frostbolt, Ice Lance, Ice Lance, Ice Lance, Ice Lance, Ice Lance,

Shaman
Totems Grounding, Mana spring, Searing, Stoneskin
I spam healing wave on the tank.

Anyone see any problem or how i can increase my dps so that i can work my way forward ??