We just had another session yesterday, this time on Hard and with a complete squad (thanks to Crazy). Me and Amarth also used the mics, though I stopped using it after a while. It makes strategy something different.
And we must mention the difficulty of the last mission once again: we took AGES. First there were the parasites, then the shieldbugs blocking our way, and last but not least, a metal door that fell into and killed us. A note: stay away fom that metal door!
Eventually, Narvius performed an epic rush on his own, managing to start the bomb detonation and reach the final area on his own. The mission was complete after all the epic rushing, stunning and dodging of mine. I didn't believe I had done it!