I just killed an Ostwind and 1 P4 with guards in my last match.. They do pretty well even against tanks on Vet 2/3, especially when put in buildings.
Just be aware of the building's health so it doesn't suddenly collapse.
Also the button ability is pretty nice, you can use it to kill with your Su85, T34, to get in range for AT nades or even kill the whole tank by nading it when it is on ice.
One of the most intense matches I've ever had, 1h long, some funny things and some totally OP mgs which instantly pin without suppression
Must see this!
GG NikCoH ;D