Quick and dirty. Two long range weapons, two medium-short range weapons. ER PPC on standby for a good critical hit up close. I fire the SRM6's in chainfire. This extends the spash over a larger area, and yet remains easy to control. The distraction to your opponent buys you time to make those precise shots with your more substantial or accurate weapons. That is also why I lay heavy on the SRM ammo. With missiles at all ranges, , the enemy is too busy to fire back at you without taking cover. Giving you time to use your other weapons with more patience.
I replaced your LPLP with a regular one, mounted a better engine and modified the armor a tiny bit to add another 2 tons of LRM ammo. This results in - better cooling, - more speed and - better long range capabilities while not loosing much in the short range department.