Shaman DPS cycle - Your thoughts

Hello everyone,

When I see posts about Shaman dps I feel depressed :p not because it's bad but because I never achieve those results.

I cleared without many hassle all BC heroic content as well as ten boxed Kara and ZA except last boss, so I'm not qq here about how bad my dps is, because I've always felt it was more than enough :).
Pre WotLK I had 1.15k spell power, 180+ Haste and 21% crit, unbuffed. I use recount and the max I was able to do was 1.3k dps. I read figures and they always state +2k... I need that, what am I doing wrong?

Here is my current dps cycle:

Lightning Bolt-Flame Shock-Lightning Bolt-Chain Lightning-Lava Burst-Lightning bolt

Is the problem here? Or recount doesn't love me? :p

Thanks for your help.