Profile of OZtheWiZARD

Lets see a replay of this.

No problem. I will record it especially for you.

Because countering combined arms (fortunately) requires combined arms.

Here is how I do it.
You need at least two tanks (or Pumas) which is easy as ISU-152 costs a lot and puts Soviet behind in armour by its nature.
You set up a flank. I am not talking about charging head on but about proper flank when your forces are coming from the side. You flank with one tank and keep your second tank at front with rest of the army. When your opponent sees flanking tank he will try to react and engage new threat. When he does that you advance with your main force while retreating tank that flanked. You focus ISU-152 with your tanks and enemy support with your infantry. Your Paks should concentrate on ISU-152 unless there is another tank around then they can shoot at it. All depends how the battle flows.
While ISU is trying to rotate and shoot at the tank you flanked with your other tank can shoot at it without and problem being safe at the same time. If he rotates to engage your advancing force your flanking tank should advance and try to take position behind ISU. When your tank was successful it usually means dead ISU. Now you have to circle strafe ISu with the tank that got the flank and in the mean time try to advance with your other tank to help. You have to watch out and position your tanks accordingly so you stay out of its cone of fire. ISU-152 is so slow that even if you'll get AT naded you should still be able to stay behind unless very unlucky heavy engine crit. The most important thing for your supporting infantry is to keep attacking and try to quickly eliminate everything that can endanger your tanks. Mostly ZiS guns. Key is not to stop. Even if you loose squad or two if you'll get ISU you came ahead. You need to synchronised your attack. Timing is very important. It requires a fair amount of micro as well so you need to practice a bit.
If you're playing team game remember to consult this attack with your team mate. It is crucial that you attack simultaneously.

Remember to scout first as well so you roughly know where ISU-152 is before you advance.

please share with us how to "use it correctly"

Instant acceleration helps you to flank, correct your position or GTFO if needed.

Why would you try to attack ISU-152 with infantry and Paks is beyond my imagination.

I did never say it should not, but to say PIV is on par with Sherman is not quite true.

Why is this not true?