Wanting a fusion/junkyard build of Raijin, Wayland, and Jaeger. Get the defensive armor plates from Raijin, (use the head as a base) the health regen of Weyland, (swap out the damage increase device from Raijin with the repair core from Weyland) and add on the aegis shield from the Jaeger to the back. (Plus add the larger legs of Jaeger to compensate for weight but keep the armor plating from Raijin)
A tanky titan mech would fit the spider type perfectly as they are known as heavy lifters and are often slow/stompy. Having a mech with every type of shielding as well as a way to self repair would make it a devastating weapon in combat. An easy limiter would be a small amount of weapon slots. Perhaps only featuring one on the side of the main ‘head’ would compensate.