i find myself agreeing with both sides of this argument, CL or not to CL? I think there is a place for both. Single target, i tend to find myself spamming LB exclusively unless I am sure that I will not run out of mana and DPS is important. Multitarget, i like to squeeze in CL's after my tank has solidified aggro. It allows me to do that much more DPS.

A 3 LB (or 4 with haste) + CL rotation *does* increase your dps if done properly, CL does have a lower spell coefficient, BUT, its cast time is 0.5 sec lower than LB. So it actually gains *more* DPS per spell dmg than lightning bolt, because of its faster cast time. However, its DPM is horrid for single target.

I used to LOVE using a LB LB LB CL rotation with a castsequence, but i found that if I threw out the CL too quickly, my pally sometimes would lose aggro over some of the adds. However this was before I was even level 70... perhaps now that my pally has a much higher spell damage, i can hold aggro over CL's better. Oh well I have alreaady gotten used to having a separate button for CL and LB, and throwing each spell out when appropriate =D