Just go out and spam people with UACs and LRMs. AMS can be exchanged for BAP or a DHS and armor. The MLas are only for close range defense or when you out of ammo/arms.
How I built it. Would call it the 'High Five' because every weapon basically does 5 damage (LRMs dealing 1.1 is weird and strange)
Since the XL255 is a much more useful engine across chassis than the XL260, I agree with SubjectSeven.
This is what I am running while I grind out Master on this variant. I would almost always use my Firebrand instead, but this is fun for a missile platform, especially with the tag c-bill bonuses right now. No jams from UAC5, much more ammo, and a Tag which is extremely good right now to have. I figured that one last ML was not worth bothering with. Also has more ammo than the OP. I found the quantity in the original version was far to little for the investment in LRM 5 weight you are carrying around. Need to be able to use them all match.