The Reman suppor that is beaming down to help you at some points of the base is onehitkilled by the defending romulans. On brave klingon captain is not enough to kill 4 romulan guards. In the 3rd reman beamdown was one elite guard that couldnīt be killed by the romulans. Then I was able to plant the spatial charge. The klingon forces work as expected. The remans in the final battle work good as well.