I know the Atlas LRM boat is generally frowned upon, but I like it. The MG's pair well with the SPL's up close. ML's would make for better zombie mode, however.
Prepare to get some downvotes soon. There are some LRM Atlas haters among us. In general it's pretty common to find big LRM.Launchers in Assault Mechs as you go through the Stockloadouts of all the Assault Mechs listed on sarna.net. But due to the very limited launcher-tubes of the Atlas, it's not optimal to make the atlas a long range missile supporter. Give him more direct firepower especially at mid-close range and your mates won't hate you.
I don't mind LRM's on a Atlas, in fact I like having it as secondary or tertiary but it's not a good idea to have it as primary damage dealer. A Atlas is never fast enough to keep the 180m distance required which means he will have to rely on others to push or keep the enemy away. Using LRM20's on the AS7-D also means you will have split volleys, one LRM20 will fire 10+10 and the other LRM20 will launch 6+6+6+2 which is ineffective vs AMS. If you want to use LRM's as your primary, consider a TAG to lockon despite ECM and BAP for range/avoiding getting shutdown by enemy ECM lights. The two LLAS together with the small PLAS and MG's is not enough to deter a medium or light mech from going head to head, IMHO.
