Never piloted a treb so this is really a theory build for a support brawler. Fast enough to move in and out of engagement, hefty punch with 2x LPLas and SRMs to finish em off. Having the weapons on fully articulated arms makes placing the damage where its needed easier. I'm sure it runs hotter than hell with only the engine DHS to cool the twin LPLas. Alternatively drop to (ER)LLas and use the tonnage for more heatsinks, max armor, more JJ, etc. (ER)LLas would require more time on target to deal damage however. (ER)PPCs are a direct swap in for LPLas if you're more comfortable in a ranged fire support role. Doubt I'll get one as my SHD-2D2 pretty much does the same thing. Maybe if its on sale and I'm looking to grind out another chassis.
