Car God, that's why a smart modeler outfits his T appropriately. I run plastic A-arms on the bottom and Aluminum on top. The bottom ones take a beating from ground contact, but are cheaper to replace. I have also worked on my driving to ensure that I don't get pancaked by the odd 1:1 or take a full speed impact into a stationary object. Hence, no need to worry about bending the upper aluminum A-arms.
After asking lots of questions and some driving experiments, a smart fellow can strategically place the metal pieces on his truck and leave the plastic in the right areas. End result is strenght where you need it, and sacrificial pieces where appropriate.