I've had a lot of fun and success in Quickplay with this build on the loyalty (L) variant given for free a while back. The large pulse lasers in the side torsos are mounted relatively high, allowing you to hill hump with them, while the AC/20 in the right torso is better suited for right side poking but it you're careful it isn't mounted too low. Without MASC engaged it has a top speed of 66 kph, and only 84.4 kph when engaged, but the boost to speed is not the reason for the MASC. With MASC you have near instantaneous acceleration (185%) and deceleration (175%), and a big boost to your turning rate (35%). To properly use this build you need to have throttle decay turned OFF, bind a key for the MASC (NOT toggle, that will just get you into trouble and burn your legs out), bind a key for Full Stop, one for Set Throttle 100%, and one for Invert Throttle. I wish there was a key bind to set your throttle to -100% (full reverse), but the MASC still lets you get to max reverse speed very quickly with or without inverting the throttle. Don't just hill hump or poke like this is any other mech. You NEED to use the MASC to peek, release MASC and shoot as soon as your target reticle calms down, then IMMEDIATELY start reversing, torso twisting, and turning to the side with MASC engaged to retreat to cover. OR, if it is "safe" to shoot another salvo and/or finish them off you can immediately go back into full speed ahead and punish your target before they can finish twisting and getting back behind cover. People are constantly caught off guard by a 70 ton IS mech with a pancake profile being as agile as this thing is. The MASC can also get you from cover to cover more quickly, and if you really need to GTFO you should be able to max out the MASC meter and not blow a leg by the time it cools back down. It can run rather hot, so personally I put skill points into all the Cool Run and Heat Containment nodes under Operations, as well as the Heat Gen nodes under Firepower. I also took half the Survival tree for 12.8% armor bonus, and the Auxillary nodes to be able to equip 2 Cool Shots. I would avoid putting any points into the Mobility tree as the MASC provides all you need. With both Magazine Capacity nodes you'll have 30 AC/20 shots, not 24. I spread the rest of my points among the Range, Velocity, Laser Duration, and Cooldown nodes.