So, I removed some of the ammo and upgraded the engine instead. It get's a little hot if you lay into the PPC's a lot, but I typically stick to the gauss when that happens to cool down. I added a small laser for shits and giggles, with the reduced crit chance I find that I can loose my gausses and still live.
When I started with this mech, it was a little rough going (I'm not that good of a pilot), but recently it's come into its own. This last week, for the 15ish matches I've played, I've been within the top 3 damage and kills (usually top damage/kills) for the match (both public and group queue). The highlight being a 7 kill (8 KMDD) match @ ~800 dmg.