GRF-1N This one is pretty straightforward: maximize your long-range punch against heavier mechs, while maintaining a strong deterrent against lighter harassers. You're going to pay a ghost-heat penalty if you alpha all three LLas, so you may want to chain them if you're running hot and scrambling. For sniping I'd take the heat penalty.
Recently switched from my usual 3x MLas 3x SSRM2 super-fast light-hunter build to something very similar to this. Mine's a bit slower, but has maxed armor. Getting more consistent high damage with it, and I like the expanded engagement envelope. Too bad "The Hook -->" is painted on the inside of the left arm with the Buccaneer pattern...