240 dmg pretty average dmg output for is-2 to be effective heavy breakthru tank .
320&360 dmg would be ideal with longer reload time would fit more but the main problem of the tanks in this game is the game mechanics. Tanks are stoppable by T0 units in this game. . also infantry is verry effective vs tanks , heavy tanks fuel requirements are too high that tanks arrive to battllefield little late and dont have enough time to vet,
no matter how much relic does buff & nerf , is-2 and other heavy tanks wont be effective as what community expects/hopes. Game mechanis needs a redesign
TAnks are not that effective against inf, not he other way around. A single suqd of riflemen wont destroy a P4 unless they have 5 zooks. But on the other way TTK on tanks to inf is pretty big, damage being done mainly by their main gun rather their hull Mgs, wich is the most unlogical thing, unless the tank has HE and is used in a garrisoned building.
Is very unlikely to redesign such a deep game mechanic by now. Buy ay least you gave you PoV.
In a CoH2 mod, wikinger, all mgs suppress, even the tank ones. This way tanks at least can stop infantry coming frontally. Snares are needed if you dont want tanks to rush in to your base and literally breaking the game.