Yeah, I'm not going to drop that much armor for one JJ I also have no clue why you wasted money on Artemis IV with a mech that has no missiles After playing with it a while, I realized that I had way too many JJs; odd as it may sound, the primary purpose of JJs on a heavy (at least the way I play) is to quickly turn your mech so that fast mechs can't outflank you. You also don't need 6 or 7 JJs to get on top of good sniping positions, though it helps. So, here's a mech that drops some JJ's in exchange for more heat sinks; Needless to say, alpha striking 2x ERPPCs 4 or 5 times in rapid succession is a royal f*ck-ton of damage. You can cripple any mech in the game if your targeting is good.
I usually don't run just PPC's. I like a little back up. that said, this build can work for people who always hit there target. Those who do, I respect you.