The Answer answers all your questions. "What is the answer to the Ultimate Question of Life, the Universe and Everything?", "What is 6x9 (given you use a base 13 numeric system)?"; even the really hard ones like "Why would I pilot a KDK-1?" and "I have a stock XL400 but I want to make my mech more expensive and slot perfect, what do I do?" It's all there. We're done. The computation is complete. Disclaimer: Evidently this not a serious build, but it should be able to do something considering the level of heat dissipation and capacity and 40 dmg strikes in each arm. It should be possible to make something less stupid as well using an XL350, even more SHS and maybe some large lasers mixed in with the mediums, but where's the fun in that?
I don't know. The Meta vomit style lowers the damage output... Unless you went to gauss too.... But that is hotter.
Can you actually alpha strike with that build? If yes, then it could be glorious for the lulz (but don't forget the towel). True, but you have almost doubled range (which is good, due to the fact you can't brawl) and have no ghost heat issues.
Added two missing DHS in the CT and added a more common engine might be worth it to get a TC1 in the head too.