I just read through this whole thread and can't believe the number of times that the OP asked if he should overclock his laptop. The one thing that wasn't mentioned is how little performance increase would be gained by OCing the GPU. Because it's a laotop and has a restricted air flow the temps will prohibit the GPU from being overclocked to any meaningful level. The FPS increase would be minimal and not noticable.
Cleaning out the vents and using a laptop cooler will only bring down the already high temps that a laptop has.
If the OP wants to select a Best Answer he can PM me and I will reopen this thread , but for now it's closed.