This is more cancerous in 4v4 which I usually play as okw. They go on 2 vp's, build their simcity, and are basically set for the game.
Sorry to have to say this, but this is your fault because counterbattery ability is no problem for axis on 4vs4 maps. I once played myself vs 4 brits all going heavy on emplacements. They build a megacity of mortar pits and bofors protecting their pits at the entrance points. Eventually we wrecked them.
So here is what you should do:
- Take the third VP
- Ignore one simcity completely and team up wity all your mates to attack the other one with brutal force
- use LeiGs, Mortar Ht, mortars and maybe At-Guns or tanks (depends on his setup) to force brace on emplacements (you have a lot more units so even the german mortar which usually looses versus pit will be useful)
- kill bofors first when brace wore off, then support your attack with infantry and shreks
- go for second simcity after first one is killed, it will be hard to recover for them
Btw. in late game Elephant and Jagdtiger is quite useful versus Emplacements because they do constant damage at a much longer range than other tanks. This forces your opponents to react. You should try that if you come that far and be prepared fo a counter attack of course.