Stalker armor set: just equip the Wildfire helmet, Sludge Mk 9 gloves, and the Chameleon body armor and boots.
Flaming Wrench: you have to wear all the Wildfire armor.
Ice 2 armor set: equip the Crystallix helmet and the Hyperborean body, gloves, and boots.
Fire-Bomb armor set: just equip the Mega-Bomb helmet, Mega-Bomb Body armor, Wildfire gloves and Mega-Bomb boots.
Shock Crystal armor set: just equip the Electroshock helmet and boots with the Crystalix body armor and gloves.
Triple Wave armor set: equip the Wildfire helmet, the Sludge MK 9 gloves, and the Electroshock body armor and gloves.
Wildburst armor set: use the M9 Sludge helmet and the rest of the armor from the Wildfire set.