Not that the title means anything, but I am an engineer and I'm not sure I understand any of this, lol.
The OEM AHC TB and shocks are made to hold the same weight as the non-AHC variety. If we're getting particular I think the LX AHC system is actually designed to hold MORE weight. The LX...
#1: Perhaps don't buy a big steel bumper if the goal is to minimize stress. There are a few great aluminum bumper options that are plenty strong and half (or less) the weight of the elephant TJM. Those old-school steel bumpers score quite low on the "performance per weight" category to me.
#2...