Simply put, cERML and cSRM6. You use the C type for the extra energy hardpoint. You can build it on other CT, just swap the cERML with ammo/JJ/TC1
After messing with the mechlab once I received my Mad Cats, I ended with a very similar build, switching 2 SRM6 to SRM4 and adding Artemis (and a couple extra JJ, I like jumping ). I go with less ammo too, and for now I didn't have any problems with that. That could change with more games. I'm having a blast with it. At mid-"long" range is pretty good with those 6 cERML, while at close range can obliterate anything with the SRM20+A and the lasers. It needs some fire discipline at close combat tho, as it can run *very* hot with a happy trigger, but full skills should help a bit with it.
