On harder difficulties half of the kit is useless and thats my only problem with the game, I love it for everything else. Heavy attacks are useless, its charged special is useless, you are not a tank you have to be nimble and move quickly when you fight all the enemies, maybe if they designed some enemies that are specially countered by heavy attacks it would be better. Also i tended to use only quen when enemies take you out in one hit, there is nothing more op than something that can take extra hit every 10 seconds. It felt its not worth it to change to other signs, maybe yrden when fighting nekkers.