The Boom Puma updated with new tech. Used an -A, but swapped the arms for a -D and -Prime to support the extra firepower. Heats up, but if you can get behind someone and land an alpha, it is spectacular. Stick with the big boys as best you can. This build has worked for me in urban settings where you can hide and brawl.
boom adder has to be one of my fave builds just for the fact of slapping an AC/20 on a light. but something I didn't look into and wish I did sooner but the B variant has a -15% cooldown for ballistic weapons if you use an LBX rather than a standard 20 or the ultra variant. (-5% ballistic cooldown from the B left arm omni pod bonus -10% LBX cooldown from the omni set bonus) it has the same hard point placement so you can make the same exact build, sans the normal AC/20 and using an LBX variant. With full cooldown nodes in the skill tree you can get and extra -12% applying to your -15% ballistic cooldown and your -10% energy cooldown. Edit note: I just looked at the skill tree. and I guess clans get less than IS mechs in the skill tree. with full cooldown nodes you only get a -9.6% which is still good but sort of bothers me. Spoiler but personally I would drop the fourth HSL and shave the armor of the right arm for more ammo for the LBX AC. Spoiler
