The LB-10 and SRM2s both have a cooldown of around 2s I put them in one weapon group and fire together at short range. The LLs & LB together work well together at range upto 450m. I chose the XL to make the most of the MASC, but you could swap for LE. With Balistic & Energy Cooldown of 15% plus some structure and other quirks this mech has some nice bonuses! MASC +28% Speed Tweek +7.5% =100KPH! Pretty fast for a fat boy!