Imagine if that PIV had an engine. The IS-2 would be smoked!
LOL
In that video ... that single is2
1)managed to deflect the faust and kill most of the gren squad in 1 hit
2)killed the engineers repairing the VETERAN pz4 in 1 hit
3)attacked a VETERAN PZ4 and yes due to bad luck one of your shots missed the pz4 but noticed how many times the p4 shots just deflected. By the time you destroyed that pz4 he was already on vet2. So you cant compare a unvetted is2 to a 2 star veteran pz4.
IS2's anti inf capability is far far far far better than a tiger btw. Tiger is only slightly better than is2 against tanks.
Imo is2 is still a viable option .... it can soak up quite a bit of damage. IF you have 85's backing it up its unstoppable almost