Currently one counters bofors and other emplacements mainly with mortars, while waiting for the armor to roll out. But land matrass counters mortars and even the panzer werfer very, very efficiently, making it very hard to fight emplacements. moreover the ambush commandos can make short work of mortars too, especially with their grenades/gammon bombs.
Therefore I would like to suggest that landmatrass cp requirement moves up to 8 and that its number is limited to 2. Additionally ambush commandos should start with a cooldown on their grenades/gammon bombs of 20 seconds after spamming, thus making them less click and kill but maintaining their lethality in the long run.