So this is the point that I was trying to get across earlier. If you have 4 out of 5 spells that could be on cooldown worst case is you have to press a button 5 times. This has to slow down the dps you have to be missing the GCD while attempting spells that are on cooldown.

So I think the attempt at trying to get a long cast sequence is better. Personally I don't like cast sequences b/c I would rather be able to react to what is going on rather than try to find an optimal sequence. There were many times that I would finish off a boss or a trash pull by an earthshock right after a lightning bolt.

I guess it is different if you have a tank and aren't watching all 5 cast the same thing.