the stock grind with heatfs is good i dont mind it but patton tanks especially magach -1 and 2 tanks and some other tanks have apcr as first round which cant penetrate anything the only thing player can do is to capture bases but patton tanks arent that fast to go capture first and in top tier tank have multiple variants of apfsds you should give the apfsds that has lowest penetration as the stock shell insted of the heatfs it really hurts for players to grind and thermals should be in the first row in the modifications because its really necessary to actually survive in top tier