MEC-3 (Long War)
The MEC-3 is the ultimate in combat exoskeletons and has an embedded tactical sensor suite.
This top-of-line suit is an upgrade of the MEC-2 one and can boast remarkable armor HP and defenses.
Do note that starting from beta 14g the Tactical Sense perk will be removed and another Accessory slot will be open for a total of two. This will make it better than the MEC-2 in all aspects.