Hey mate!
The way I found that worked best for me is to practice predicting retreat or dodge paths. With blobs this is harder, but usually people will move the entire blob, instead of spreading it out, which gives you a good chance or wiping everything if you correctly judge their dodge or retreat path.
With team weapons, it is ususally a full on retreat once they hear it. The team weapons (mg, mortar) will pack up and run back instantly once they packed up. This means that a horizontal spread isn't the best way to aim. Of course if there is a line of team weapons, this is what you want to do by instict, but it isn't the best option. If you aim horizontally, all the opponent has to do is move all his team weapons back a bit and he will dodge your salvo! Or he retreats and the team weapons pack up and sprint straight back to base, meaning your salvo will miss too. So always prioritize one or two team weapons and anticipate the inevitable backpaddle or retreat.
having said that, always calculate that at least 20% of the barrage falls in front of the units, just in case some smart ass moves his units forward instead of backwards.
When I started doing this, I got more results!
Got it, thanks.
Tho i must say, the problem is not necessarily get team weapons, but that even if i get those there is always one/two scattered models that survive and come back to fight before cooldown finish, so i really have issues protecting my schewer or countering indirect fire.
Have you managed to 1 hit wipe a mortar with it or i must backtech to tier 1.