I've heard quite a bit about it, but when I actually attempted with a friend for a mission (Got a dex tank which was impossible for me to hit alone) we didn't seem to be in the same combat(On my side I was stumbling to hit my enemy, but my friend instantly KO'd her.), and the mission on my end was not finished. Plus, I'm in hospital. :P
Could someone elaborate on how it works and if there was anything I was doing wrong, and how to get the connection to work?