Shoot&Scoot...

[Soldier]

In my experience all large Russian tanks JS2's and the likes, should use only shoot and scoot, unless enemy panzer they dueling with, can not possibly penetrate their frontal armor.
A JS2 tank fires (game wise speaking) only a round a minute. Why expose it to the enemy any longer, than it takes to aim and shoot it's one round.
Roll it back out of enemy's sight to reload and repeat the process once a minute, etc..