To counter the clan mech, I try to speed up my DDC to allow better TT and more continuous fire on target. I finally end with this very simple build : It could seem underpowered, but you can use your weapon really consistently and I manage to deal lots of damage with it. Hereafter my first game with it (my next games were not as monstruous, but I deal quite a lot of damage too)
Indeed it looks underpowered at first, but you managed to deal very good damage so I guess it's not so bad. The armor values on legs and arms are still pretty high, what about shaving it a bit and add an AMS and/or little ammo? (5 tons feels light for 2 cannons).