https://mwo.nav-alpha.com/mechlab?b=7a4b970f_JM6-S Very similar to my Blackjack Build but with more armor since it's a heavy mech, better heat-management and better DPS. In the April-Patch a Light AC/5 ammo quirk was added, so you don't need that much ammo.
https://mwo.nav-alpha.com/mechlab?b=b8a28b34_JM6-DD If you like that, you might like 6xLAC5s on the JM6-DD. It is a bit more dangerous with the XL engine.