Keep in mind that you will never fire the SLas and the LRMs at the same time; the max range of the SLas is exactly the same as the min range of the LRMs. The heat efficiency of the LRMs alone is 45%. The reason I chose this particular LRM layout is that it is very multi purpose. If the target has AMS, you can throw out heavy 50-point single-volley missile alphas. If they don't, you can easily induce massive blinding and cockpit shake with auto-staggered LRM flights; the different cooldown times of each LRM launcher mean you can actually moderate your ammo use with relative ease, even if all the LRMs are put in one weapon group. EDIT; Archwright wanted TAG, so I modified it by replacing a SLas and some armor.