"Centurion IIC", short range brawler. Doesn't have enough ammo but GOES WOT FASTE! You should probably be able to understand why I like this this. If you don't mind running a STD engine, the same build with 2LBX10 instead of the AC20 is very nice, but it lacks speed. I consider buying a 2nd of this mech just to run it. Cool running mech, but limited range.
Possible duplicate of https://www.mechspecs.com/threads/cp-11-dc-murder-machine-1xac20-3xsrm6-a-1xsrm4-a-std315.11330/ Weapon layout is the same, engine size differs. About the build itself, I love it: almost maxed ghostheat-less alpha strike, very good speed, good tank, decent ammo count. Honestly I would never drop with so few heatsinks because in a brawl cooling efficiency is even more important: once engaged in a brawl most of the times you can't run or hide, so you must get the most dissipation you can. Downgrading to a more efficient LE350, add some armor to arms for better tanking and additional cooling is always welcome. I've also used this build succesfully in solaris (top 10 division 2), but compared to the following build instead of +3 tons of ammo I've swapped them for almost max armor and +1DHS.