Helicopter duel is kinda messed i dont think they balanced it well, basically flares only stop missile hitting you ECM works as before but more reliable and better. So me and my housemate using coms ECM pilot and Flares gunner, we dominated on caspian, he went 28-0 i went 8 or 9-0 got hit by one igla disabled and repaired before he could reload and lock. When attacking i was shooting 1 heatseeker (which lock on insanely quick) waiting for the flares then giving it 2 seconds and guaranted hit if they arnt in coms or gunner using flares (give it 2 other wise the missle goes mental as doesnt hit) also i found with it bang on 2 secs i could get then 1st reloaded heatseeker to hit heli aswell before pilot could flare again then get 2nd one off and hes dead.