hey,try to use every strategy not just spam one unit(asg).
yeah that assualt would destroy most opponent(but in your current level rank opponent) in higher level u will find out panzer faust is necessary (dont let them easilly breakthrough) mines always usefull but its not enough to stop light vehicle(sweeper) .try to make units combined.anyway as some guys said ostrrupen would be usefull+snper then 222would good choice if u can micro it well. about emplacement try to dont let them build it soon(delay)when they make it the game vs ukf will start
.use AT guns grounds attack in fog or give them sight to destroy it u can use also arty but counter battery annoy u,so better use mortar ht to replace it fast.