Now I managed to advance in the map pack, after last update. Thx!
[OM6]
Begin level, Voltigarts an Alien Grunts, place some medkits before first door we open.
It's almost a certain death, the beginning of the map.
I suggest placing some ammunition or explosive weapon inside the room where we hit the button, after crossing the courtyard where we fought Gargantua, Big Momma and the Drone. Because it happens that the monsters block the exit and we get trapped inside this room without conditions to defeat the monsters because we do not have enough explosive ammunition.
[OM7]
In addition, I was stuck on the OM7 map because of the excess of monsters that no longer ends, very frustrating to have to die without stopping and do not know are inifinite or not.