Developed due to a question. How can a rail walker 1v1 an smg gunbed and have a chance to come out on top. These bots were the answer to that. They both have a delicate balance of being able to lose guns at about the same rate as the armor (as long as you point your whole bot forward), could survive multiple plasma volleys. Due to it's thinness it uses layered armor on the sides plus the triforcing. The R211 uses EPs at the front to survive longer from pot shots, while the R213 swaps out the EPs for 2 jammers for the stealth and extra health on the sides.
Stopped using it after armor health got halved.