using use the Game and DLC's and no mods how far into mech madness can we push builds...?

I can see a number of new technologies being added from all the DLCs, such as LACs, MRMs, X-Pulses, and heavy lasers, along with a bevy of Clan/Clanbuster mechs and Hero mechs. So, how far can we push mech design to create truly monster builds?

The nothing but 6 ATM6s and ammo Vulture-b was a silly direction to go in, but it does raise the question: what’s actually possible?