So much bullshit. When the ISU is out you should have out KT / JT and other stuff. C'mon so much bullshit.
ISU is overpowered, period. Maps help were you can not flank, Puma is going down due to Guards, Pz IV flanking is also doomed and Jagdpanzer IV can not reliable penetrate it and flanking with a turretless tank is as good as your bullshit advices.
Alone this quote
but you can scare it off. Getting a couple of potshots with some schrecks and at guns/armor will make ISU back off. ISU does not have very strong armor. I think it can get killed by 2-3 shots of Kingtiger/Jagdtiger
Armor is not very strong, you can kill it with Kingtiger/Jagdtiger. Wow we got a Shakespeare with rocket engineering knowledge here.
AT guns will not reliable penetrate it, but will reliable be decrewed. Other things are not going to work well.
While the ISU is the perfect thing to come back from a game or to finish of the enemy, you can nearly do something when the enemy got the initiative and is able to field it fast because you have no serious counter for it except lategame units that are fuel hungry like Jagdtiger/Elefant/Kingtiger.
Everybody who said l2p - just learn to grow up, look at some stuff in all objectivity, get serious and than write back.