This build is designed for team play. 2AMS allow allies to survive a hail of missiles. LRM20 helps to keep enemies at a distance. 6x Mlas ensure the destruction of all life. And it's full by armor and a good engine! This is a good alternative vs Battlemaster.
i think 2 tons of AMS.Ammo is enough, because i don't see soo damn much LRM.Boats nowadays. Everybody's running a Phoenix Mech and only few play a LRM.Battlemaster. You could try to load a second LRM20.Pod for more Firesupport.Power over Range or due to Tube.Size-Limit you could downgrade to 2x LRM10 and upgrade some MLas to LLas:
