we had some set rules for our games....it was either all energy weapons, and no "Zippos" which meant all flamers that come up and hit you once and make you overheat into shut down. Or we would play True C6. Which any weapons, but no missile boats, and no twin UAC 20's. Worked out really well to get some interesting mechs to go against that way.
My c6 madcat was 2 lrm 15, 2 streak 6, and 5 erm med lasers...all clan. targetting comp, jump jets, 5 AMS, max heatsinks, and the rest in engine. good mech for all around fighting, max armor as well.
my energy mech was a shadowcat with 6 er medium lasers grouped four and two, max armor, jump jets, the rest in heat sinks and engines. i could blast with the four mediums all day long without overheating, then when i had a clear shot i could alpha strike with all six for impact. another good mech.