I've spent the better part of a whole week designing and working on this build.
The NX-Fury (Rex), has been built from the base design of both the B-Raptor Small and the NX-Raptor. Unlike the other two, NX-Fury (Rex) is beefy, speedy, and can take as much damage as she can put out.
When in full sprint/pursuit mode the NX-Fury (Rex) leans forward, reducing the height profile of the bot. This also gives the SMG clear air for firing at targets. This is called closing the gap as you advice on the target and ready to us the Tesla Blades.
I've found that jumping in at the target, and switching from SMG to Tesla Blades. Stay in the fight long enough to take out the bot, and disengage to allow for repair cool down. However the NX-Fury (Rex) can take a pounding, even at 35% health left she is deadly.
As you'll note in one of the pictures, the NX-Fury (Rex) has a housing chamber between the legs. This chamber can be used for other specials. Another advantage is the ability to change out the legs. Adding more shield and health as needed. However at this point the NX-Fury (Rex) is not as effective in combat.