I play a lot of DD and SD games and I use a round by round average discard count. This has is so I dont have to look at the discard tray nor make any deck estimations. With that said, I know one day i will eventually have to play 6 deck games and when that time comes i'm probably going to move to an unbalanced counting system. Its pretty incredible that some of the unbalanced systems offer the same returns as a balanced system.