I sure hope you're a sniper. When this fella dies, his electromagnetic pulse temporarily disables weapons and propulsion on all bots and exos within 7 tiles. And worse, he wakes up all the bots within 14 tiles.
EMPBots are harmless until destroyed. If you get hit, bear in mind that switching to another exo will pause the first exo's EMP recovery.
Picking EMPBots off in a clump of enemies can buy you some valuable time to destroy the other bots.